Melting point :-50 °C
alpha :-0.2～+0.2°(20℃/D)(neat)
Boiling point :191-192 °C/747 mmHg (lit.)
Density :1.006 g/mL at 25 °C (lit.)
vapor pressure :10-2130Pa at 20℃
refractive index :n20/D 1.438(lit.)
Flash point :200 °F
storage temp. :Storage temp. 2-8°C
form :clear liquid
pka :14.49±0.20(Predicted)
color :Colorless to Light yellow
Water Solubility :100-1000g/L at 25℃
BRN :969169
Henry's Law Constant :2.1×10³ mol/(m³Pa) at 25℃, Burkholder et al. (2019)
Cosmetics Ingredients Functions :SOLVENT
SKIN CONDITIONING
HUMECTANT
VISCOSITY CONTROLLING Cosmetic Ingredient Review (CIR) :1,2-BUTANEDIOL (584-03-2)
InChI :1S/C4H10O2/c1-2-4(6)3-5/h4-6H,2-3H2,1H3
InChIKey :BMRWNKZVCUKKSR-UHFFFAOYSA-N
SMILES :CCC(O)CO
LogP :-0.34-0.3 at 25℃
CAS DataBase Reference :584-03-2(CAS DataBase Reference)
EPA Substance Registry System :1,2-Butanediol (584-03-2)

Symbol(GHS):
Signal word:	Warning
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
Precautionary statements:	P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P280 Wear protective gloves/protective clothing/eye protection/face protection. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P337+P313 IF eye irritation persists: Get medical advice/attention.