Neopentyl Glycol (NPG)
Key monomer for polyester resins, powder coatings, and lubricants
Supply Origins
Packaging
25 kg Bags
Related Product
About Neopentyl Glycol (NPG)
Neopentyl Glycol (NPG, IUPAC: 2,2-dimethyl-1,3-propanediol, CAS 126-30-7) is a white crystalline aliphatic diol produced by the aldol condensation of formaldehyde and isobutyraldehyde followed by hydrogenation. Its unique neopentyl structure — two methyl groups flanking the central carbon — eliminates the β-hydrogen atoms that cause hydrolytic instability in conventional glycol-based polyesters. Polyesters and alkyd resins made with NPG exhibit outstanding UV resistance, hydrolytic stability, and colour retention, making NPG the preferred diol for high-durability powder coatings, automotive topcoats, and outdoor architectural coatings. NPG is also used as a building block for synthetic lubricants (polyol esters) and polyurethane prepolymers. First Chemicals supplies NPG from verified producers in China and Japan with guaranteed ≥99% purity and low acid value.
Key Applications
- Saturated and unsaturated polyester resins
- Powder coatings (TGIC and HAA systems)
- Alkyd resins for industrial and architectural coatings
- Synthetic lubricants — polyol ester base oils
- Polyurethane prepolymers and elastomers
- Plasticisers for PVC and other polymers
Typical Specifications
* Specifications are typical values. Actual COA provided with each shipment.
Frequently Asked Questions
What is Neopentyl Glycol (NPG) used for?
NPG is primarily used in polyester resins (saturated and unsaturated), powder coatings, alkyd resins for paints and varnishes, synthetic lubricants (polyol esters), and polyurethane prepolymers. Its neopentyl structure gives coatings and resins superior UV resistance, hydrolytic stability, and colour retention vs. conventional glycols like ethylene glycol.
Why is NPG preferred over other glycols in powder coatings?
NPG's neopentyl structure eliminates β-hydrogen atoms, which are the primary cause of hydrolytic degradation in polyester chains. This gives NPG-based polyesters exceptional resistance to heat, moisture, UV, and yellowing — critical for outdoor powder coatings on architectural aluminium, garden furniture, and automotive parts.
What purity grade does First Chemicals supply NPG in?
We supply NPG at ≥99% purity with acid value ≤0.05 mg KOH/g, water content ≤0.05%, and a melting point of 124–130°C. A Certificate of Analysis (COA) is provided with every shipment.
Where does First Chemicals source Neopentyl Glycol from?
We source NPG from verified manufacturers in China and Japan — two of the world's largest NPG producers — giving us access to multiple supply origins for pricing competitiveness and supply reliability.
What is the minimum order quantity for NPG?
NPG is supplied in 25 kg bags. Minimum orders are typically one FCL (full container load). Please contact us with your required quantity and destination for a firm quote.