1,2-BUTANEDIOL
- Product Name
- 1,2-BUTANEDIOL
- CAS No.
- 26171-83-5
- Chemical Name
- 1,2-BUTANEDIOL
- Synonyms
- 1,2-BUTYLENE GLYCOL;1,2-BUTANEDIOL;(±)1,2-Butaneiol;1,2-BUTANEDIOL 98%;1,2-DIHYDROXYBUTANE;(+/-)-1,2-BUTANEDIOL
- CBNumber
- CB8664950
- Molecular Formula
- C4H10O2
- Formula Weight
- 90.12
- MOL File
- 26171-83-5.mol
1,2-BUTANEDIOL Property
- Melting point:
- 0.07°C (estimate)
- Boiling point:
- 191-192 °C747 mm Hg(lit.)
- Density
- 1.006 g/mL at 25 °C(lit.)
- refractive index
- n20/D 1.438(lit.)
- Flash point:
- 200 °F
- CAS DataBase Reference
- 26171-83-5(CAS DataBase Reference)
Safety
- WGK Germany
- 2
- RTECS
- EK0380000
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P280Wear protective gloves/protective clothing/eye protection/face protection.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
1,2-BUTANEDIOL Chemical Properties,Usage,Production
Chemical Properties
1,2-Butanediol is a colorless liquid that is soluble in water.
Uses
1,2-Butanediol can be used as an ink solvent, as well as in the production of polyester resins and plasticizers. It can also be used as a raw material for unsaturated polyester resins by reacting 1,2-butanediol with unsaturated dicarboxylic acid.
Definition
ChEBI:1,2-Butanediol is a butanediol in which the two hydroxy groups are located at positions 1 and 2. It has a role as a metabolite. It is a butanediol and a glycol.
Hazard
1,2-Butanediol is irritating to the eyes. Exposure at high levels could cause lowering of consciousness.
Synthesis
In a 100 L reactor, 50 kg of water, 10 kg of acetone, 44 kg of potassium peroxodisulfate complex salt (oxone, 0.071 Kmol), potassium chloride 6.3 kg (0.11 Kmol) and 1-butene 4 kg (56.11, 0.071 Kmol) were added and heated. Stirring reaction to 30 ° C for 12 h, after the reaction is completed, reduce the temperature to 25 ° C, add 20% potassium hydroxide aqueous solution to adjust the pH to 12, heat to 40 ° C, stir reaction for 4h. After the reaction, it was cooled to room temperature, kept strong alkaline, extracted with dichloromethane to remove impurities, and then adjusted to pH 2 with 6 mol/L hydrochloric acid. The product was extracted with ethyl acetate, and the solvent was evaporated to give 1,2-butanediol 5.65 kg, yield 88%.
1,2-BUTANEDIOL Preparation Products And Raw materials
Raw materials
Preparation Products
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