Is NPG 90 the same material as solid Neopentyl Glycol on an equal-weight basis?

No. NPG 90 is normally an aqueous grade containing about 90 parts Neopentyl Glycol and 10 parts water, whereas solid or flake NPG has a different water balance. Process charging must be calculated on the agreed NPG active basis.

Which commercial form should be specified for a Neopentyl Glycol order?

Specify flake, molten or aqueous solution, then state the required NPG content, water, colour and applicable hydroxyl-value basis. These forms have different handling temperatures, storage arrangements and reactor water balance, even though they relate to the same CAS number.

Can Neopentyl Glycol be substituted directly with another diol in a resin recipe?

Not as a direct replacement. A different diol changes molecular structure and can affect esterification, resin properties and processing. The intended formulation must define the monomer choice, molar ratio and acceptable water balance before any substitution is considered.

Neopentyl Glycol (NPG) CAS 126-30-7

Neopentyl Glycol (NPG, CAS 126-30-7, EC 204-781-0) is a diol building block used in polyester, alkyd, polyurethane, plasticizer and synthetic-lubricant production. For polyester systems specifying a cycloaliphatic diol, 1,4-Cyclohexanedimethanol (CHDM) is a related monomer option; the full formulation must be qualified. Solid or flake NPG and aqueous solution grades such as NPG 90 are different commercial forms; availability of either form must be confirmed rather than assumed. Specify the required form, assay or concentration, water, color, hydroxyl value, packaging and process requirements, then review the current TDS, COA and SDS for the offered grade.

CAS: 126-30-7
Synonyms: NPG; Neopentyl Glycol; 2,2-Dimethylpropane-1,3-diol; 2,2-Dimethyl-1,3-propanediol; Dimethylolpropane
Einecs: 204-781-0
Molecular Formula: C₅H₁₂O₂
Grade: Confirm required physical form, assay or concentration, water, color and hydroxyl value
Package: Confirm current packaging and handling requirements for the offered form

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Product Description

1 Product Overview

2 Product Information / Specifications

3 Storage, Safety and Documentation

Product Overview

Neopentyl Glycol (NPG, CAS 126-30-7, EC 204-781-0) is a diol building block used in polyester, alkyd, polyurethane, plasticizer and synthetic-lubricant production. Commercial NPG may be offered as flakes, molten material or an aqueous NPG 90 grade; these forms do not share one water balance, handling profile or package. Confirm the offered form, assay or concentration, water, color, hydroxyl value and packaging against the current product documents.

Product Information / Specifications

Product	Neopentyl Glycol (NPG) CAS 126-30-7
CAS No.	126-30-7
EC No.	204-781-0
Molecular Formula / Identity	C₅H₁₂O₂
Synonyms	NPG; 2,2-Dimethylpropane-1,3-diol; 2,2-Dimethyl-1,3-propanediol; Dimethylolpropane
Grade / Supply Specification	Confirm required physical form, assay or concentration, water, color and hydroxyl value
Packaging	Confirm current packaging and handling requirements for the offered form

For related polyester and coating polyol building blocks, see Trimethylolpropane and Pentaerythritol.

Storage, Safety and Documentation

Store and handle the product in accordance with the current supplier TDS and SDS. Confirm the applicable COA, specification, packaging and destination-market requirements before purchase or use.

FAQ - Technical & Supply Chain

Q:
Is NPG 90 the same material as solid Neopentyl Glycol on an equal-weight basis?

A: No. NPG 90 is normally an aqueous grade containing about 90 parts Neopentyl Glycol and 10 parts water, whereas solid or flake NPG has a different water balance. Process charging must be calculated on the agreed NPG active basis.
Q:
Which commercial form should be specified for a Neopentyl Glycol order?

A: Specify flake, molten or aqueous solution, then state the required NPG content, water, colour and applicable hydroxyl-value basis. These forms have different handling temperatures, storage arrangements and reactor water balance, even though they relate to the same CAS number.
Q:
Can Neopentyl Glycol be substituted directly with another diol in a resin recipe?

A: Not as a direct replacement. A different diol changes molecular structure and can affect esterification, resin properties and processing. The intended formulation must define the monomer choice, molar ratio and acceptable water balance before any substitution is considered.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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