Neodecanoic Acid (NDA / Versatic 10 Equivalent )

Quaternary Neo-C10 Branched Carboxylic Acid · Not Repr. 1B · Not HAP-Listed · Purity ≥99.0% · NDA Supplier from China · Global Shipping

✓ Regulatory Advantage - Not Repr. 1B · Not HAP-Listed · No REACH SVHC · No CMR Classification · Combustible Liquid (Flash Point ~140°C)

Neodecanoic acid (NDA, CAS 26896-20-8) has a significantly cleaner regulatory profile than its C8 counterpart 2-ethylhexanoic acid (2-EHA). NDA is not classified as a reproductive toxicant (Repr. 1B) under EU CLP - a critical distinction from 2-EHA which carries Repr. 1B (H360D). NDA is not listed as a US EPA Hazardous Air Pollutant (HAP) - another direct advantage over 2-EHA. NDA is not on the REACH SVHC Candidate List and is not subject to REACH Annex XIV or Annex XVII restrictions. EU CLP classification covers only mild skin and eye irritation (H315, H319). Flash point ~140°C - Combustible Liquid (Class III-B), simpler logistics than lower-flash-point materials. This favourable regulatory profile makes NDA the preferred branched carboxylic acid precursor for metal neodecanoate synthesis in applications where Repr. 1B-free supply chain documentation is required. Sinolook provides EU CLP-compliant SDS, non-HAP declaration, and TSCA confirmation with every shipment.

ℹ What Makes NDA a 'Neo Acid' - Quaternary Alpha Carbon & Exceptional Hydrolysis Resistance

The prefix 'neo' in neodecanoic acid is chemically precise: it designates an acid with a quaternary alpha carbon - the carbon adjacent to the carboxyl group bears four carbon substituents and no hydrogen atoms. Structure: R₁R₂R₃C–COOH. This complete alpha-carbon substitution creates steric shielding around the carboxylate that makes NDA and its metal salts exceptionally resistant to hydrolysis under acidic and alkaline conditions - more so than 2-EHA (secondary alpha carbon) or straight-chain C10 fatty acids. In metal neodecanoate salts, this hydrolysis resistance means the metal-carboxylate bond remains intact under waterborne coating conditions, high humidity, and alkaline substrates (concrete pH 12–13, galvanised steel) where less-hindered metal carboxylates hydrolyse rapidly and lose catalytic activity. NDA is produced via the Koch carbonylation of branched C9 olefins, which inherently produces neo-structure acids with the quaternary alpha carbon.

ℹ Acid Value Specification - Important Note for Metal Neodecanoate Synthesis

The theoretical acid value for 100% pure NDA (MW 172.26 g/mol) is ~326 mg KOH/g (56,100 / 172.26). Sinolook's specification of 320–328 mg KOH/g correctly brackets this value. Values of 300–315 mg KOH/g sometimes cited in the market correspond to ~92–97% purity equivalents and are not representative of high-grade neodecanoic acid. For metal neodecanoate synthesis, always use the batch-specific COA acid value - not nominal mid-range figures. A 6 mg KOH/g AV difference corresponds to ~1.8% variation in theoretical acid charge per kg, directly affecting metal content and residual free acid in the finished salt.

What is a 'neo acid' and why does the quaternary alpha carbon matter for metal drier stability?

A 'neo acid' is a carboxylic acid in which the alpha carbon (directly bonded to the –COOH group) carries four carbon substituents - making it a quaternary carbon with no hydrogen atoms. In neodecanoic acid, this quaternary alpha carbon motif is present in all C10 isomers. The importance for metal drier stability lies in the hydrolysis mechanism: base-catalysed saponification of carboxylates requires either direct nucleophilic attack at the carbonyl carbon or alpha-proton abstraction to form an enolate - both pathways are severely sterically hindered when the alpha carbon is quaternary. The result is that metal neodecanoate salts (zinc, zirconium, manganese) survive extended exposure to alkaline aqueous conditions - concrete substrate pH 12–13, waterborne alkyd emulsion pH 8–9, humid tropical weathering - where equivalent metal 2-ethylhexanoate salts (secondary alpha carbon) or metal naphthenate salts (unhindered alpha carbon) hydrolyse and lose catalytic activity within days to weeks.

Is NDA the same as Versatic 10 acid?

Versatic 10 acid (a Shell/Hexion trade name) is a commercial neodecanoic acid produced by the Koch carbonylation of C9 olefins - the same chemistry used to produce Sinolook's NDA - and is defined by the same CAS 26896-20-8 and the same structural characteristic of a quaternary alpha carbon. The trade name 'Versatic' denotes the neoacid structure (a contraction of 'versatate,' referencing the varied neo-isomer mixture). Sinolook's NDA is produced by the same Koch process and meets the same technical specification (AV ~320–328 mg KOH/g, neo-isomer composition, quaternary alpha carbon). Buyers who specify 'Versatic 10 equivalent' or 'neo-decanoic acid Koch-process' in procurement specifications will find Sinolook's NDA to be a technically equivalent supply source. Technical comparison vs Versatic 10 specifications is available on request.

Can NDA replace 2-EHA in metal drier synthesis - what are the formulation adjustments?

NDA can replace 2-EHA in zinc, calcium, manganese, and zirconium metal carboxylate drier synthesis with straightforward adjustments: (1) Acid value difference - NDA AV ~326 vs 2-EHA AV ~389 mg KOH/g; to deliver the same molar quantity of carboxylate per kg, approximately 19% more NDA by weight is needed, which affects the acid charge calculation; (2) Viscosity - NDA (~15–25 mPa·s) is more viscous than 2-EHA (~6–8 mPa·s), possibly requiring slight adjustment of synthesis solvent blend or reactor temperature; (3) Metal salt performance - metal neodecanoates have measurably better waterborne stability, which may change drier dose rates in waterborne alkyd formulations; (4) Cost - NDA is typically higher cost per kg than 2-EHA, offset by the regulatory value of the Repr. 1B-free profile. Sinolook's technical team provides substitution guidance and AV-adjusted synthesis protocols for customers transitioning from 2-EHA to NDA.

What is vinyl neodecanoate and how is it related to NDA?

Vinyl neodecanoate (VeoVa 10 type, CAS 51000-52-3) is the vinyl ester of neodecanoic acid - produced by transvinylation of NDA with vinyl acetate in the presence of a palladium or ruthenium catalyst. The NDA neo-C10 group is incorporated intact into the acrylic copolymer backbone when vinyl neodecanoate is emulsion-copolymerised with VAc, vinyl chloride, or acrylic esters. The vinyl neodecanoate units in the copolymer are highly resistant to alkaline saponification because the ester bond is sterically protected by the same quaternary alpha carbon that protects NDA itself. This saponification resistance is the technical basis for VeoVa-type copolymer binders in exterior masonry coatings, concrete paints, and renders - where conventional vinyl acetate-based binders fail through ester hydrolysis on alkaline substrates (pH 12–13). NDA is the essential acid feedstock for all VeoVa-type vinyl neodecanoate production. See: ECHA - Vinyl Neodecanoate (CAS 51000-52-3) →

Contact Sinolook - Your Trusted Neodecanoic Acid (NDA) Supplier

Whether you are a coating drier formulator synthesising zinc, zirconium, manganese, or calcium neodecanoate for waterborne alkyd and cobalt-free drier systems requiring hydrolytic stability and Repr. 1B-free documentation; a vinyl ester producer making vinyl neodecanoate (VeoVa 10 equivalent) for exterior masonry and render coating binders; a PU catalyst manufacturer producing bismuth neodecanoate as a tin-free, cobalt-free urethane catalyst; a synthetic lubricant producer formulating polyol neodecanoate ester base oils; an epoxy resin formulator using NDA as a reactive diluent and flexibiliser; or a supply chain manager seeking to replace Repr. 1B 2-EHA with a functionally equivalent, regulation-compliant neodecanoic acid - Sinolook Chemical delivers purity ≥99.0%, COA-verified acid value for precise metal salt stoichiometry, genuine Koch-process neo-isomer composition, and the complete Repr. 1B-free regulatory documentation package your EU and global supply chains require. Our team responds within 24 hours.