1,2-Propanediol
meets analytical specification of Ph. Eur., BP, USP, ≥99.5%
About This Item
Linear Formula:
CH3CH(OH)CH2OH
CAS Number:
57-55-6
Molecular Weight:
76.09
General description
1,2-Propanediol is an important petrochemical that can be prepared by the hydrogenolysis of glycerol. It is mainly used as a cryoprotectant for biological samples and also as an additive in food, cosmetic and pharmaceutical industries.
1,2-Propanediol is an 1,2-alkanediol. It can be obtained from glycerol, via hydrogenolysis in the presence of Ru/C and Amberlyst ion-exchange resins.
Vapor Density: 2.62 (vs air)
Quality Segment: 200
Vapor Pressure: 0.08 mmHg (20 °C)
Assay: ≥99.5%
Form: Liquid
Autoignition Temperature: 779 °F
Quality: meets analytical specification of Ph. Eur., BP, USP
Shelf Life: 24 mo.
Explosion Limit: 12.5%
Impurities: acidic reac. impurities, complies; organic volatile impurities, complies (GC); oxidizing substances, complies; reducing matter, complies; residual solvents, complies; ≤0.0005% heavy metals (as Pb); ≤0.002% free alkali (as NaOH); ≤0.003% free acid (as CH3COOH); ≤0.2% water (Karl Fischer)
Ignition Residue: ≤0.005% (as SO4)
Refractive Index: n20/D 1.431-1.433, n20/D 1.432 (lit.)
Boiling Point: 187 °C (lit.)
Melting Point: −60 °C (lit.)
Density: 1.036 g/mL at 25 °C (lit.)
Anion Traces: chloride (Cl-): ≤50 mg/kg, sulfate (SO42-): ≤50 mg/kg
Suitability: complies for appearance of solution
SMILES String: CC(O)CO
Functional Group: hydroxyl
