How to Buy Neodecanoic Acid from China:
Supplier Guide, Shipping & Documentation
Supplier qualification · Sample ordering · COA verification · DG Class 8 freight · REACH/TSCA documentation · Incoterms · QC release
🔗 Request Quote from Sinolook Chemical📋 Table of Contents
- The Complete Buying Journey: Overview
- Supplier Selection: What to Look For in a Chinese NDA Supplier
- Sampling & Qualification: From Lab Test to Production Trial
- Specification Negotiation: What to Put in Your Purchase Contract
- Packaging Options: Drums, IBC and ISO Tank
- Incoterms Guide for NDA Purchases from China
- Class 8 DG Sea Freight: What to Expect
- Complete Documentation Checklist
- Receiving & In-House QC Release
- Common Purchasing Errors and How to Avoid Them
- Frequently Asked Questions
🗺️ 1. The Complete Buying Journey: Overview
📋 End-to-End NDA Purchase Process from China
Total timeline: first purchase typically 6–12 weeks from initial contact to goods receipt; subsequent orders 3–6 weeks (production + transit time)
🔍 2. Supplier Selection: What to Look For in a Chinese NDA Supplier
Not all Chinese companies offering neodecanoic acid are actual producers. The NDA supply chain in China includes genuine Koch acid producers, traders sourcing from producers, and - occasionally - companies offering mislabelled or adulterated products. A structured supplier evaluation protects against all three risks.
- Hazardous Chemical Production Licence (危险化学品生产许可证) - legal requirement for Koch acid manufacturers in China; ask to see the licence number and verify
- Koch carbonylation synthesis capability - ask directly about their synthesis process; a genuine producer can describe the pressure, temperature, CO source, and olefin feedstock; a trader cannot
- Batch retention samples - genuine producers hold retention samples; traders typically cannot
- GMP/ISO factory audit availability - willing to undergo third-party factory inspection
- Consistent batch COAs over time - request 3–5 recent batch COAs; genuine producers show consistent AV in the 315–335 range; traders may show variable or suspiciously round numbers
- GC-MS capability - able to provide GC-MS chromatogram confirming C10 neo acid isomer profile
- Unusually low price (below $1,800/MT FOB) - probable INA or IOA passed off as NDA; or heavily diluted/off-spec material
- AV on COA is suspiciously round (exactly 325 or exactly 330) - real batches rarely land on exact round numbers; suggests fabricated COA
- Cannot provide GC-MS or describe synthesis route - likely a trader with unknown source
- APHA colour suspiciously consistent (always "15" or "20" regardless of batch) - suggests nominal rather than actual test values
- No Hazardous Chemical Production Licence - cannot legally manufacture Koch acid in China
- Refuses retention sample or batch hold - no production records to refer to
- Cannot provide REACH OR letter or TSCA certification - non-compliant for EU/US supply chains
| Company registration (营业执照) | Request copy |
| Hazardous Chem. Production Licence | Request copy |
| 3–5 recent batch COAs | Verify AV range, APHA |
| GHS SDS (EN or DE or FR) | Check Section 2 (no H361) |
| REACH OR letter availability | Must be EC 248-093-8 |
| TSCA positive cert. availability | CAS 26896-20-8 listed |
| GC-MS identity confirmation | On request basis |
| Sample availability (0.5–10 kg) | DG courier shipment |
🧪 3. Sampling & Qualification: From Lab Test to Production Trial
| Stage | Quantity | Tests to Conduct | Pass Criteria | Decision Gate |
|---|---|---|---|---|
| Stage 1: Lab QC | 0.5–2 kg | Acid value (ASTM D974); APHA colour (D1209); Water content (KF); Density (D1298); Refractive index (Abbe 20°C); Iron (ICP - for premium grade) | AV 315–335; APHA within spec; Water ≤0.1%; RI 1.432–1.440 | Pass all 5 parameters → proceed to Stage 2; Fail any → reject this supplier/lot |
| Stage 2: Identity Confirmation | 0.5 kg | GC-FID or GC-MS (C10 neo acid isomer profile); confirm not INA (C9) or IOA (C8) by carbon chain distribution; ¹H NMR (no α-H) optional for definitive confirmation | C10 neo-type acids >90% of area; no C8 or C9 peaks >5% | Pass identity → proceed to Stage 3; Fail → reject and investigate (wrong product) |
| Stage 3: Synthesis Trial | 2–10 kg | Pilot metal soap synthesis (Co, Bi, Zr, or your target metal) with Chinese NDA; compare: product colour (APHA), clarity (haze), metal% (ICP), free acid %, and for driers: dry time at fresh; for Bi PU catalyst: gel time in model PU system | Metal%, colour, and activity match or exceed current NDA standard; no turbidity or precipitation | Pass synthesis trial → proceed to Stage 4; Fail → investigate (could be Fe, water, or AV issue); re-sample premium grade |
| Stage 4: Accelerated Shelf Life | Trial product from Stage 3 | Store 6 × 100g samples at: 25°C/75% RH; 40°C/75% RH (accelerated). Test at 1, 3, 6, 12 months: turbidity, activity (dry time for driers, gel time for Bi PU). Compare to current NDA reference | >90% activity retained at 12 months (or better than reference NDA) | Pass accelerated stability → proceed to Stage 5 (or conditionally release while testing continues) |
| Stage 5: Full Production Trial | 50–200 kg | Full-scale commercial synthesis batch; confirm no scale-up surprises; QC check finished product to full specification; notify customers if required by change control procedures | Full specification compliance on production batch | Pass → approve Chinese NDA as standard / alternate source; update approved vendor list |
📝 4. Specification Negotiation: What to Put in Your Purchase Contract
| Parameter | Specification | Method |
|---|---|---|
| Product identity | Neodecanoic acid CAS 26896-20-8 | COA |
| Acid value ⭐ | 315–335 mg KOH/g | ASTM D974 |
| Colour (APHA) | ≤ 50 | ASTM D1209 |
| Water content | ≤ 0.10% | Karl Fischer |
| Density (20°C) | 0.903–0.910 g/cm³ | ASTM D1298 |
| Refractive index (nD²⁰) | 1.432–1.440 | Abbe refrac. |
| Appearance | Clear liquid, no haze | Visual |
| Parameter | Specification | Method |
|---|---|---|
| Acid value ⭐ | 318–330 mg KOH/g | ASTM D974 |
| Colour (APHA) | ≤ 20 | ASTM D1209 |
| Water content | ≤ 0.05% | Karl Fischer |
| Iron content | ≤ 5 ppm | ICP-OES |
| Saponification value | = AV ± 3 mg KOH/g | ISO 3657 |
| For sol-gel / Ti/Zr grade | Cl⁻ ≤5 ppm; S ≤5 ppm | IC / XRF |
📄 Key Clauses to Include in Purchase Contract
📦 5. Packaging Options: Drums, IBC and ISO Tank
| Packaging | Net Capacity | Net Weight | Units per 20ft | Best for | Pros / Cons |
|---|---|---|---|---|---|
| 200L Steel Drum | 200 L | ~181 kg net | ~80 drums (~14.5 MT) | Small–medium users; flexible stock management; 1–15 MT orders | ✅ Widely available; flexible splitting; standard DG packaging ⚠️ Higher per-MT cost; drum disposal/return required; more handling |
| IBC (1,000L) | 1,000 L | ~908 kg net | ~12–14 IBCs (~11–13 MT) | Users with IBC handling; 3–15 MT orders; good economy | ✅ Better per-MT economy than drums; easier unloading with forklift/pump ⚠️ Requires IBC cage return or disposal; less flexible than drums for partial use |
| ISO Tank | ~24,000 L | ~18–20 MT | One ISO tank = full 20ft equivalent | Large users with tank farm; ≥15 MT per order; best economy | ✅ Lowest per-MT price; no packaging waste; direct unload to tank ⚠️ Requires tank farm or bulk receiver; minimum 18 MT; ISO tank rental cost |
🚢 6. Incoterms Guide for NDA Purchases from China
| Incoterm | Who Handles DG Booking? | Who Pays Freight? | Risk Transfer | Best For |
|---|---|---|---|---|
| FOB | Buyer books freight; supplier loads | Buyer pays freight + insurance | On board vessel at Chinese port | Buyers with own freight forwarder experienced in DG Class 8; larger volumes; price transparency |
| CIF ⭐ | Sinolook handles DG booking end-to-end | Seller pays freight + insurance to destination port | On board vessel | Most NDA buyers - Sinolook manages DG complexity; buyer handles customs at destination only |
| CFR | Seller books freight; buyer arranges insurance | Seller pays freight to destination port; buyer pays insurance | On board vessel | Buyers who self-insure or have blanket marine insurance; otherwise similar to CIF |
| EXW | Buyer arranges all logistics from Sinolook's warehouse | Buyer pays all freight from seller's warehouse | At seller's warehouse | Not recommended for NDA - buyer must manage Chinese DG export licence and inland transport; very complex for non-China-based buyers |
| DDP | Sinolook handles all logistics including import customs | Seller pays all freight, duties, and taxes to buyer's door | At buyer's premises | Buyers who want fully landed cost transparency; available for some destinations; discuss availability with Sinolook |
💡 Recommendation for first-time China NDA buyers: Use CIF to your nearest major port. Sinolook Chemical manages the DG booking, Class 8 container labelling, DGD, container packing certificate, and all Chinese export documentation. You only need to arrange: (1) your country's DG import clearance (if applicable - most countries have standard DG import procedures); (2) customs clearance at destination port; (3) inland delivery to your facility. CIF gives you a total landed-cost price that is directly comparable to your current supplier's pricing, simplifying the business case for switching to Chinese-origin NDA.
🚢 7. Class 8 DG Sea Freight: What to Expect
| UN Number | UN 3265 |
| Proper Shipping Name | Corrosive liquid, acidic, organic, n.o.s. (neodecanoic acid) |
| Class | 8 (Corrosive) |
| Packing Group | III (low hazard) |
| EmS | F-A, S-B |
| Stowage | Category A (away from food, etc.) |
- 200L drums: UN-approved steel drums with UN mark (e.g., 1A1/X250/S) for Class 8 PG III; closure with gasket; Class 8 label on each drum; UN marking on drum
- IBC: UN-approved IBC (31A/Y type for PG III) with Class 8 labels on two opposite sides; UN marking; UN-certified IBC
- ISO tank: T7 or equivalent; Class 8 placard on all four sides; UN 3265 visible; Class 8 label; orange panels front and rear
- Container: 20ft standard (dry container - NDA is liquid, sealed drums); Class 8 container label on both doors and both sides
| Order confirmation → COA issued | 7–14 days |
| DG booking → container loading | 3–7 days |
| Container port departure | +1–3 days |
| Transit China → Rotterdam/Hamburg | 28–35 days |
| Customs clearance (DG) | 2–5 days |
| Delivery to facility | +1–3 days |
📁 8. Complete Documentation Checklist
| Document | Purpose | Copies | Retention |
|---|---|---|---|
| Batch Certificate of Analysis (COA) | QC reference; confirms batch spec compliance; AV critical for stoichiometry | 1 original + PDF | 5 years minimum; reference batch number matches drum/IBC label |
| GHS Safety Data Sheet (SDS) | Worker safety; REACH compliance; supplier obligation under REACH Art.31 | PDF per language | Keep current version; update when supplier revises; accessible to all handlers |
| REACH OR Confirmation Letter | EU REACH compliance; confirms non-EU manufacturer's OR registration obligation fulfilled | 1 per shipment | File per shipment; required if EU customs queries REACH status |
| TSCA Positive Certification | US import requirement; certifies TSCA compliance of CAS 26896-20-8 | 1 per shipment | File per shipment; CBP may request; retain 3 years minimum |
| Dangerous Goods Declaration (DGD) | IMDG legal requirement; certifies DG shipper compliance; shipping line requires before acceptance | 3 originals | One stays with shipment; file copy retained at shipper and freight forwarder; 5 years |
| Container Packing Certificate (CPC) | IMDG requirement; certifies container packed correctly for DG by qualified person | 1 per container | Integrated with DGD in many systems; retain with shipping records |
| Bill of Lading (BL) | Title document; required for customs clearance at destination; must show Class 8 DG description | 3 originals | Original BL presented to release goods at destination; file copy for accounts |
| Commercial Invoice & Packing List | Customs value declaration; quantity confirmation; required for import clearance | 3 originals | Customs archive requirement (typically 3–5 years depending on jurisdiction) |
| Certificate of Origin (COO) | Customs duty tariff determination; may trigger preference duties (e.g., GSP for developing country buyers); HS code 2915.90 | 1 original | File with customs records; retain if used for preferential tariff claim |
🔬 9. Receiving & In-House QC Release
- Count units (drums/IBCs); confirm quantity matches packing list
- Inspect for damage: crushed drums, leaking seals, damaged IBC cages
- Verify Class 8 UN 3265 labels are present and legible on all units
- Check batch number on drum/IBC label matches batch number on COA
- Confirm product name and CAS number on label: "Neodecanoic acid, CAS 26896-20-8"
- If any physical defect: photograph, quarantine, and notify Sinolook within 24 hours
| Test | Frequency | Time |
|---|---|---|
| Acid value ⭐ | Every batch | 20 min |
| APHA colour | Every batch | 10 min |
| Water content (KF) | Every batch | 20 min |
| Density | Every batch | 5 min |
| Refractive index | Every 3rd batch | 5 min |
| Iron (ICP) | Quarterly or new lot | 1–3 days |
⭐ Acid value: the single most critical test - must be done every batch; use result for synthesis stoichiometry calculation
⚠️ 10. Common Purchasing Errors and How to Avoid Them
| Common Error | Why It Happens | How to Avoid |
|---|---|---|
| Using the IOA synthesis recipe without adjusting for NDA's lower AV | Habit from previous IOA-based synthesis; procurement switches acid but synthesis team is not informed; batch AV not re-checked | Always re-calculate metal oxide charge from batch COA AV before each synthesis; update SOPs with AV-based calculation formula; brief synthesis team at supplier switch |
| Ordering "neodecanoic acid" and receiving isononanoic acid | Some Chinese traders use the terms interchangeably; CAS 26896-20-8 vs 26896-18-4 differ by one digit and are easy to confuse; unscrupulous suppliers may supply cheaper INA as NDA | Always specify CAS number on PO; test incoming AV (NDA 320–330; INA 348–360); GC-MS on first batch from each new supplier |
| Assuming DG documentation is not needed because NDA "isn't that dangerous" | Logistics team sees no H361, high flash point, and assumes no DG; DGD is omitted from booking; shipping line refuses cargo or NDA arrives without proper documentation | NDA is always Class 8 UN 3265 regardless of health profile; Sinolook prepares DGD automatically for every shipment; confirm DGD inclusion at booking stage |
| Failing to request REACH OR letter for EU imports | Procurement focuses on product quality; REACH OR documentation is overlooked; EU customs or internal audit flags missing REACH compliance documentation | Include REACH OR letter as a standard line item in all EU purchase orders; Sinolook provides automatically; file with each shipment record |
| Comparing Chinese NDA price on FOB basis to Western NDA on CIF/DDP basis | Chinese supplier quotes FOB; Western supplier quotes CIF or DDP; direct comparison makes China look less competitive than it is after freight is added to the Western price | Always compare on the same Incoterm basis; add freight/insurance/DG surcharge estimate to Chinese FOB price to get comparable CIF; use CIF price for business case |
| Not verifying batch number on drum matches COA | COA is issued for correct batch; different batch is shipped; discrepancy only discovered during a quality incident | Check batch number on COA against drum/IBC label at goods receipt - takes 5 minutes and is the most important incoming verification step |
| Choosing cheapest price without qualification | Procurement pressure to minimise cost; skips qualification process; unknown supplier supplies INA or IOA as NDA, or low-quality NDA that fails in synthesis | Always qualify with lab QC + synthesis trial before commercial order; use the 5-stage qualification process above; the qualification cost is negligible vs cost of a failed production batch |
❓ 11. Frequently Asked Questions
Q1: How do I start the process of buying neodecanoic acid from Sinolook Chemical?
Starting the process with Sinolook Chemical is straightforward. Send us an enquiry by email (sales@sinolookchem.com) or WhatsApp (0086 18150362095) with the following information: (1) Product: Neodecanoic acid, CAS 26896-20-8; (2) Grade: Standard (APHA ≤50) or Premium low-colour (APHA ≤20, Fe ≤5 ppm); (3) Quantity: Your required quantity per order and estimated annual volume; (4) Packaging: Drum, IBC, or ISO tank; (5) Destination: Port of destination or city; (6) Incoterms preference: CIF, FOB, or other; (7) Application: Brief description (e.g., cobalt drier synthesis, Bi PU catalyst, GE-NDA production) - this helps us confirm the right grade; (8) Required documents: REACH OR letter (EU), TSCA certification (US), or other. We will respond with a quotation, COA sample, and SDS within 24 hours. If you wish to qualify before ordering commercially, we can arrange a sample shipment (0.5–10 kg) for your laboratory evaluation.
Q2: What documents does Sinolook Chemical provide with each NDA shipment?
Sinolook Chemical provides the following documents as standard with every neodecanoic acid shipment: (1) Batch Certificate of Analysis (COA) - with actual tested values for acid value, APHA colour, water content, density, and refractive index; batch number matching drum/IBC labels; premium grades additionally include Fe content; (2) GHS Safety Data Sheet (SDS) in your requested language - 16-section REACH Annex II format; confirming no H361, GHS02+GHS07 pictograms, UN 3265 Class 8 in Section 14; (3) Dangerous Goods Declaration (DGD) - IMDG Class 8, UN 3265, PG III; signed by our certified DG dangerous goods safety adviser; (4) Container Packing Certificate (CPC) - confirming container packed per IMDG requirements; (5) Commercial Invoice and Packing List; (6) Bill of Lading (original 3/3); (7) Certificate of Origin (Form A or standard form); and upon request: REACH OR Confirmation Letter for EU buyers; TSCA Positive Certification for US buyers; K-REACH documentation for Korean buyers. All documents are prepared and provided at no additional charge - included in the quoted product price.
Q3: What should I check on the Certificate of Analysis (COA) when I receive neodecanoic acid?
The most critical check on the COA for neodecanoic acid is the acid value. For standard grade, confirm it reads 315–335 mg KOH/g; for premium grade, 318–330 mg KOH/g. If the AV is outside these ranges - particularly if it is 345–360 (suggesting INA) or 375–395 (suggesting IOA) - reject the batch and contact Sinolook immediately. Beyond acid value, verify: APHA colour is within your specified limit (≤50 standard; ≤20 premium); water content is ≤0.10% (standard) or ≤0.05% (premium); the CAS number stated is 26896-20-8 (not 26896-18-4 INA or 25637-84-7 IOA); the batch number on the COA matches the batch number printed on the drum or IBC label (mismatch means the COA does not apply to the goods received); the test values are actual measured values, not nominal specifications (genuine COAs show values like "324.7 mg KOH/g" rather than the suspiciously round "325 mg KOH/g"). Run your own incoming QC check on at least the acid value and APHA - these two tests take 30 minutes combined and confirm the most critical parameters before releasing the batch for production use.
Q4: Can Sinolook Chemical ship neodecanoic acid to my country?
Sinolook Chemical has shipped neodecanoic acid to customers in more than 50 countries across Europe (Germany, Netherlands, Belgium, France, UK, Italy, Spain, Poland, Turkey), the Middle East (UAE, Saudi Arabia, India, Pakistan), Southeast Asia (Vietnam, Thailand, Indonesia, Malaysia, Philippines), East Asia (South Korea, Japan, Taiwan), South America (Brazil, Argentina, Colombia), Africa (Kenya, Egypt, South Africa, Nigeria), and North America (USA, Canada, Mexico). For each destination, we manage the full DG documentation chain required for Class 8 sea freight. Country-specific considerations: some African and South Asian destinations require DG import permits in advance - we advise customers to confirm their country's DG import requirements and, where applicable, obtain the import permit before placing an order; EU customers require REACH OR letter (provided standard); US customers require TSCA positive certification (provided standard); some countries require additional consular legalisation of documents - advise us at order stage if this is required. If you are unsure whether Sinolook can ship to your specific country, contact us at sales@sinolookchem.com with your port of destination and we will confirm feasibility and provide an estimated freight cost within 24 hours.
Q5: What is the typical lead time for neodecanoic acid orders from China?
Total lead time from order confirmation to goods receipt varies by destination: (1) China → Europe (Rotterdam, Hamburg, Antwerp): ~6–9 weeks total - production and packaging 7–14 days; DG booking and container loading 3–7 days; sea transit 28–35 days; customs clearance 2–5 days; inland delivery 1–3 days; (2) China → Middle East (Jebel Ali, Dammam): ~4–6 weeks total; (3) China → Southeast Asia (Singapore, Bangkok, Ho Chi Minh): ~3–4 weeks total; (4) China → USA (Los Angeles, New York): ~5–7 weeks total; (5) China → Brazil: ~7–10 weeks. For time-critical orders, airfreight of limited quantities is possible (DG limited quantity rules apply - typically ≤30 kg per package for Class 8 by air). For regular buyers with planned consumption, we recommend maintaining 6–8 weeks of safety stock at your facility, ordering when stock reaches the reorder point, and using annual contracts to lock in pricing and priority production scheduling. Contact us if you need expedited shipping options for urgent requirements.
Q6: Why should I choose Sinolook Chemical as my neodecanoic acid supplier?
Sinolook Chemical offers four specific advantages for international NDA buyers: (1) Competitive pricing: Our Chinese-origin NDA is 40–60% lower cost than BASF Versatic 10 or ExxonMobil at equivalent specification, with standard and premium low-colour grades available to match your application requirements; (2) Full compliance documentation: REACH OR letter, TSCA positive certification, K-REACH documentation, GHS SDS in multiple languages, DGD, and COA per batch - all included as standard, not charged separately; (3) Consistent quality: Sourced from qualified Chinese Koch acid producers with batch COAs, retention samples, and GC-MS identity confirmation capability; standard grade APHA ≤50 and premium grade APHA ≤20 / Fe ≤5 ppm consistently available; (4) International trade expertise: We have shipped to 50+ countries and routinely handle Class 8 DG sea freight across all major shipping routes; our team is experienced with destination-specific DG import requirements, Incoterms documentation, and customs clearance support. To request a quotation, sample, or further technical information, contact us at sales@sinolookchem.com, WhatsApp 0086 18150362095, or WeChat/Tel 0086 13400715622.
Buy Neodecanoic Acid from China - Quality, Compliance & Competitive Price
Contact Sinolook Chemical Today
NDA CAS 26896-20-8 · Standard (APHA ≤50) & Premium (APHA ≤20, Fe ≤5 ppm)
REACH OR ✅ · TSCA cert ✅ · DGD included · COA per batch · 50+ countries · CIF available
