2-butene-1,4-diol

CAS Number
110-64-5
EC Number
203-787-0

What is 2-butene-1,4-diol?

2-Butene-1,4-diol (CAS 110-64-5), also known commercially as Agrisynth B2D and 1,4-dihydroxy-2-butene, is a bifunctional allylic diol used as a building block and functional ingredient across personal care and food-related applications.

Where is 2-butene-1,4-diol used?

  • Personal care: humectant supporting moisture retention in skin and hair care products
  • Food and flavor: flavoring agent and acidulant where controlled acidity and taste profile are required
  • Synthetic intermediate for specialty chemicals and polymers
  • Fragrance compounds: reactive double bond as a key point of chemical modification
  • Cosmetic formulators sourcing for moisturizing systems may evaluate it alongside conventional glycols for compatibility.

Good to know: Its dual hydroxyl groups make it a reactive intermediate for synthesis as well as a direct-use humectant and flavoring component. Handle according to standard safety protocols for industrial diols.

Commercial specifications

  • Supplied in drums or intermediate bulk containers depending on order volume

Other Names (Synonyms)

1,4-DIHYDROXY-2-BUTENE|Agrisynth B2D|2I323Z5567|1,4-Dihydroxybutene

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What are the physical properties of 2-butene-1,4-diol?

Melting Point 7 °C
Boiling Point 141-149 °C @ Press: 20 Torr
Density 1.067-1.074 g/cm³
Flash Point >230 °F
Color yellow
Form Oil
Refractive Index n 20/D 1.479

How is 2-butene-1,4-diol classified and handled safely? Learn More

Warning
GHS07· Irritant

Hazard Statements

H302 Harmful if swallowed
H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation
H402 Harmful to aquatic life
H412 Harmful to aquatic life with long lasting effects

Precautionary Statements

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.

Which trade and regulatory codes apply to 2-butene-1,4-diol?

HS Code 29053990
WGK (Germany) 3
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