⚠ CAS Number Clarification - TM810 (68515-42-4) ≠ TOTM (3319-31-1) TM810 and TOTM are distinct registered substances. TM810: mixed n-octanol/n-decanol (linear C8/C10) trimellitate - CAS 68515-42-4, EC 271-090-9. TOTM (CAS 3319-31-1): 2-ethylhexanol (branched C8) trimellitate - a structurally different compound despite similar carbon number. Different property profiles: TM810 pour point −46°C vs TOTM ~−39°C; average MW ~570 vs ~547 g/mol. Use CAS 68515-42-4 - not 3319-31-1 - in REACH downstream user notifications, IMDS entries, RoHS declarations, and procurement contracts for TM810.

ℹ Mixed C8/C10 Linear Trimellitate - Optimal Balance Between Single-Alcohol Trimellitates TM810 sits between two single-alcohol trimellitate references: tri(n-octyl) trimellitate (C8 only, MW ~529 g/mol - better low-temperature) and tri(n-decyl) trimellitate (C10 only, MW ~613 g/mol - better high-temperature). The mixed C8/C10 ester delivers the best combination: (1) Lower pour point than TOTM (−46°C vs ~−39°C) - C10 linear chain has greater conformational flexibility and lower crystallisation tendency than TOTM's 2-ethylhexyl branched chain; (2) Lower volatility than all-C8 trimellitate - C10 component raises average MW (~570 g/mol) above all-C8 (~529 g/mol), reducing 130°C volatile loss; (3) Optimal volume resistivity for medium-voltage cable insulation - linear chain's polarity profile minimises ionic impurity contribution to electrical resistivity.

Item	Method	Specification	Typical	Note
Appearance (25°C)	Visual	Colorless–Pale Yellow Transparent Liquid	Colorless	No haze, turbidity or particulate
Ester Content	ASTM D1045	≥99.0%	99.5%	Near-complete 3-site esterification; consistent plasticiser efficiency
Acid Value	ASTM D1045	≤0.10 mg KOH/g	0.05	Prevents PVC heat stabiliser consumption during processing
Moisture	Karl Fischer	≤0.10%	0.06%	Critical for hydrolytic stability; excess moisture increases acid value in storage
Color (Pt-Co)	ASTM D1045	≤50	30	Medical grade: Pt-Co ≤30 + heavy metals (Pb, Cd, Hg, Cr) on request
Specific Gravity (27°C)	ASTM D1045	0.974–0.980	0.977	Narrow range confirms consistent C8/C10 isomeric composition batch-to-batch
Refractive Index (27°C)	ASTM D1045	1.4855–1.4865	1.4860	Structural fingerprint; confirms correct mixed trimellitate composition
Viscosity (20°C)	Rotational	490–505 cP	497 cP	High-viscosity liquid; trace heating may assist cold-weather bulk transfers
Flash Point (COC)	ASTM D92	≥240°C	252°C	Combustible Liquid Class III-B; no explosion-proof storage; no vapour at ambient
Pour Point	ASTM D97	≤−40°C	−46°C	7°C lower than TOTM (~−39°C); decisive for −40°C cold-bend cable qualification
Volatile Loss (130°C/3h)	ASTM D1045	≤0.10%	0.08%	Lower than TOTM (~0.15–0.20%); validates 105°C service life + autoclave sterilisation
Volume Resistivity	KLJTM/IEC 60811	≥5×10¹¹ Ω·cm	7.0×10¹¹ Ω·cm	Critical for medium-voltage cable insulation (6 kV, 10 kV); low-resistivity impurities cause dielectric failure
Packaging	-	200 kg sealed metal drum · 1000 kg IBC	-	Combustible Liquid Class III-B; no Class 3 Flammable Liquid DG restrictions

The wire and cable industry is TM810's largest global application. IEC 60502 and UL 44 require plasticisers combining low volatility (preventing embrittlement during 20+ year cable service life) and low-temperature flexibility (maintaining performance during cold-climate cable installation). TM810 satisfies both simultaneously: volatile loss ≤0.10% at 130°C/3h ensures plasticiser retention at 105°C service (130°C is the corresponding accelerated aging test temperature), while pour point −46°C maintains flexibility at the −40°C cold-bend temperature required for IEC 60502 qualification - meeting a specification that TOTM (~−39°C) only barely achieves.

The volume resistivity requirement (≥5×10¹¹ Ω·cm, actual 7.0×10¹¹) is a critical cable plasticiser specification often overlooked by formulators: residual alcohol, catalyst traces, or ionic contaminants from inadequate purification reduce electrical insulation performance, causing increased leakage current and premature dielectric failure in medium-voltage applications (6 kV, 10 kV grades). TM810's volume resistivity, verified per KLJTM/IEC 60811, directly supports compound qualification for these cable grades.

For EV/HEV wiring harnesses (SAE J1678, ISO 6722, continuous 105°C service), TM810-based PVC compounds provide a cost-effective solution for battery cable insulation, charging cable jackets, and under-hood wiring where TM810's low migration and oil resistance prevent plasticiser extraction by engine fluids and battery electrolyte components.

Automotive interior PVC - instrument panel skins, door panel trim, seat surfaces, centre consoles - experiences solar loading reaching 90–100°C surface temperature in hot climates while demanding flexibility at −30 to −40°C in winter. Plasticiser migration causes fogging (volatile plasticiser condensing on interior glass) and surface brittleness. TM810's low volatility (flash point 252°C, volatile loss 0.08% at 130°C/3h) provides measurably better anti-fogging performance than phthalate plasticisers in automotive interior testing, across both the −40°C to +90°C passenger compartment temperature range and UV exposure conditions.

TM810's non-phthalate identity directly satisfies IMDS phthalate-free reporting requirements under the EU End-of-Life Vehicle (ELV) Directive, and its RoHS compliance eliminates the restricted substance concern for automotive electronics embedded in interior assemblies. Sinolook provides a non-phthalate product letter specifically for IMDS/ELV Directive automotive material documentation, and a RoHS Declaration of Conformity (DoC) for component-level RoHS filings.

Medical PVC devices requiring steam sterilisation (autoclave at 121°C/15 min or 134°C/3 min) must survive high temperature, steam pressure, and aqueous exposure without surface plasticiser exudation. TM810's volatile loss ≤0.10% at 130°C/3h directly validates stability through the 121°C autoclave cycle - testing at 130°C covers the 121°C exposure with margin for the 134°C rapid cycle. Low extractability in aqueous and saline media, attributable to ~570 g/mol MW reducing diffusion rate through the PVC matrix, supports biocompatibility qualification for blood contact and infusion set applications.

Compared to DEHP-plasticised medical PVC - subject to EU MDR Article 1(8) restricted substance declaration requirements for Class IIa and above devices containing DEHP above 0.1% - TM810's non-Repr. 1B, non-REACH-restricted status eliminates the obligation to justify DEHP content in device technical documentation and clinical evaluation reports. Applications: infusion sets, blood collection bags and tubing, dialysis blood lines, urinary catheters, nasogastric tubing. Medical-grade COA with Pt-Co ≤30, heavy metals, and batch extraction screening available on request.

High-temperature synthetic lubricant base oil: TM810's operating range of −46°C to ~250°C (defined by pour point and flash point) covers a wider thermal span than most mineral oils and competing synthetic esters. In high-temperature chain lubricants, high-speed bearing greases, and air compressor oils, TM810's pour point of −46°C is significantly lower than TOPM (−27°C) - making it the preferred trimellitate ester for cold-start performance at −40°C. TM810 is miscible with PAO and Group III/II mineral oils in all proportions for semi-synthetic blends. A proven blending formula for high-temperature chain oil needing both cold-start and high-temperature performance: TOPM 60–70% (base, high-temperature stability) + TM810 20–30% (lowers blended pour point below −40°C) + PAO 10–20% (oxidative stability, VI).

Heat-resistant PVC seals, sheets & artificial leather: Non-phthalate plasticiser in industrial seals, gaskets, conveyor belts, and automotive artificial leather. Non-phthalate status satisfies RoHS and ELV requirements; flexibility at −46°C maintains seal performance in cold-climate outdoor service.

PVB & specialty resin plasticisation: Permanent plasticiser for polyvinyl butyral (PVB) interlayer films in architectural and automotive safety glass, specialty PU and acrylic resin systems, heat-resistant coatings and adhesives requiring high thermal stability, low volatility, and low migration at elevated service temperatures.

Property	DEHP / DOP 117-81-7	TOTM 3319-31-1	TM810 68515-42-4	TOPM 3126-80-5
Ester type	Di-ester phthalate	Tri-ester trimellitate (branched C8)	Tri-ester trimellitate (linear C8+C10)	Tetra-ester pyromellitate
Avg. MW (g/mol)	~391	~547	~570 (higher than TOTM)	703
Flash Point (°C)	~185	~245	≥240 (actual 252) ✓	≥265 (actual 270) ✓✓
Pour Point (°C)	~−55	~−39 ⚠ (marginal vs −40°C)	≤−40 (actual −46) ✓✓ best trimellitate	≤−18 (actual −27)
Volatile Loss 130°C/3h	-	~0.15–0.20% ⚠	≤0.10% (actual 0.08%) ✓ lowest	≤1.5% @ 250°C/1h
Volume Resistivity	~1×10¹¹ Ω·cm	~5×10¹¹ Ω·cm	≥5×10¹¹ (actual 7.0×10¹¹) ✓	-
Low-temp flex −40°C	Good	Marginal ⚠	Excellent ✓✓	Adequate
EU Repr. 1B	Repr. 1B ⚠	Not classified ✓	Not classified ✓	Not classified ✓
REACH / RoHS	Annex XIV + RoHS ⚠	OK ✓	Non-phthalate · RoHS DoC ✓	OK ✓
Key strength	Lowest cost	Balanced performance	Best low-temp + cable ✓✓	Best high-temp stability ✓✓

TM810 vs TOTM: Lower pour point (−46°C vs ~−39°C) is decisive for −40°C cold-bend cable installation in cold climates; lower volatile loss at 130°C/3h (0.08% vs ~0.15–0.20%) extends 105°C cable service life. TM810 vs TOPM: TM810 preferred below −30°C (pour point −46°C vs −27°C); TOPM preferred above 200°C (lower evaporation loss at 250°C/1h, highest carbon-deposit resistance in chain oil). TM810 and TOPM are complementary and mutually miscible - optimal blend formula available from Sinolook technical team.

Sinolook documentation per shipment: EU CLP SDS (no CMR, no SVHC, REACH registered) · REACH no-restriction letter · RoHS Declaration of Conformity (non-phthalate) · Non-phthalate product letter for IMDS/ELV · TSCA confirmation · Non-HAP declaration · Medical grade on request: Pt-Co ≤30, heavy metals, batch extraction screening.

✅ Simple handling: Flash point ≥240°C and negligible ambient vapour pressure mean no flammability or inhalation hazard under normal conditions. Non-CMR, non-phthalate, non-HAP. Standard mild-irritant industrial hygiene only.

Q: What is the difference between TM810 and TOTM - are they the same product?

TM810 and TOTM are related but distinct substances - both TMA-derived trimellitate esters, but with different alcohols. TOTM uses 2-ethylhexanol (branched C8), CAS 3319-31-1; TM810 uses a blend of n-octanol (linear C8) and n-decanol (linear C10), CAS 68515-42-4. Measurable differences: TM810 pour point −46°C vs TOTM ~−39°C, and volatile loss 0.08% vs ~0.15–0.20% at 130°C/3h. For most applications (105°C cable, automotive interior PVC, lubricant base oil), TM810 and TOTM are functionally interchangeable, with TM810 preferred when the lowest pour point and cold-temperature flexibility are priorities. Always use CAS 68515-42-4 for TM810 in REACH filings, IMDS entries, and procurement documents - not CAS 3319-31-1.

Q: Does TM810 comply with EU RoHS Directive restrictions on phthalates?

Yes - TM810 is fully RoHS 2011/65/EU compliant, including the 2019 phthalate amendments. TM810 is a trimellitate ester (ester of benzene-1,2,4-tricarboxylic acid), structurally unrelated to phthalate esters (esters of benzene-1,2-dicarboxylic acid / phthalic acid). The RoHS phthalate restriction (DEHP, BBP, DBP, DIBP ≤0.1% by weight) applies specifically to those four phthalates and other restricted substances - not to trimellitate esters. Sinolook provides a RoHS Declaration of Conformity explicitly confirming TM810's non-phthalate identity for cables, connectors, automotive components, and electronic equipment covered by the Directive.

Q: Why does TM810 achieve −46°C pour point - lower than TOTM's ~−39°C?

TM810's −46°C pour point vs TOTM's ~−39°C results from the difference in alcohol chain structure. TOTM's 2-ethylhexyl (branched C8) chains have restricted rotational freedom from the branch point, limiting the conformational mobility that allows low-temperature pumpability. TM810's n-decyl (linear C10) chains are longer and have greater conformational flexibility - they adopt extended conformations that pack less efficiently and require lower temperatures to arrest molecular motion. The two additional methylene units of the C10 chain contribute an internal plasticising effect. This 7°C pour point advantage is directly significant for cable installations in Northern Europe, Canada, Russia, and northern China where the IEC 60502 cold-bend test qualification at −40°C is required.

Q: Can TM810 be mixed with TOPM or PAO in lubricant formulations?

Yes - TM810 and TOPM are mutually miscible in all proportions, as are TM810 with PAO and Group II/III mineral oils. Blending TM810 with TOPM allows interpolation between TM810's superior cold-start performance (pour point −46°C) and TOPM's superior high-temperature stability (flash point 270°C, lowest carbon deposition at 260°C/3h). A proven chain oil formula requiring both cold-start and maximum chain cleanliness at 250°C: TOPM 60–70% + TM810 20–30% + PAO 10–20% - giving blended pour point below −40°C while retaining most of TOPM's high-temperature advantage. TM810's three ester groups also help solubilise anti-wear and antioxidant additive packages in PAO-rich formulations. Sinolook provides blending guidance and formulation optimisation support for TM810/TOPM/PAO combination lubricants.

Related products: TOPM (CAS 3126-80-5) - four-ester pyromellitate, best-in-class 260°C chain oil & medical PVC  ·  TOTM (CAS 3319-31-1) - branched C8 trimellitate reference  ·  DEGEAC (Carbitol Acetate)  ·  NEP (N-Ethyl-2-pyrrolidinone)  ·  PGMP (Propylene Glycol Monomethyl Ether Propionate)