1,3-Butanediol

CAS Number
107-88-0
EC Number
203-529-7

What is 1,3-Butanediol?

1,3-Butanediol (CAS 107-88-0), also known as 1,3-Butylene glycol, is a short-chain diol.

Where is 1,3-Butanediol used?

  • Personal care: humectant that conditions and retains moisture in skin creams, serums and hair products
  • Polymer manufacturing: chain extender and cross-linking agent in polyurethane synthesis, influencing hardness and flexibility of the final elastomer
  • Coatings and adhesives: improves film flexibility and substrate adhesion in solvent-borne and waterborne systems
  • Specialty sealants and elastomers: plasticizer for controlled softness and elongation
  • It also functions as a reactive intermediate.

Good to know: Often preferred over propylene glycol for its lighter skin feel and safety profile in topical applications. Cosmetic-grade material meets purity requirements for leave-on and rinse-off personal care formulations; technical-grade supply serves polymer and industrial coating applications where cosmetic-grade purity is not required.

Commercial specifications

  • Drum and IBC quantities; bulk tanker options for high-volume buyers

Other Names (Synonyms)

Butane-1,3-diol|1,3-Butylene glycol|Butylene glycol|1,3-Dihydroxybutane|beta-Butylene glycol|Methyltrimethylene glycol|1-Methyl-1,3-propanediol

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What are the physical properties of 1,3-Butanediol?

Melting Point <-50 °C
Boiling Point 207.5 °C @ Press: 760 Torr
Density 1.0059 g/cm³ @ Temp: 20 °C
Flash Point 250 °F
Appearance colourless liquid
Color Clear colorless to yellow, may discolor to brown on storage
Odor odorless
Form Liquid
Water Solubility SOLUBLE
Vapor Pressure 0.06 mm Hg ( 20 °C)
Refractive Index n 20/D 1.44(lit.)
pH 6.1 (500g/l, H2O, 20℃)
Log P -0.9 at 25℃

How is 1,3-Butanediol classified and handled safely? Learn More

Warning
GHS02· Flammable

Hazard Statements

H226 Flammable liquid and vapor

Precautionary Statements

P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment.

Which trade and regulatory codes apply to 1,3-Butanediol?

HS Code 29053920
Storage Class 10 - Combustible liquids
WGK (Germany) 1
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