Melting point :-45 °C (lit.)
Boiling point :204-205 °C (lit.)
Density :1.12 g/mL at 25 °C (lit.)
vapor density :3 (vs air)
vapor pressure :1.5 mm Hg ( 20 °C)
refractive index :n20/D 1.436(lit.)
FEMA :3291 | 4-HYDROXYBUTANOIC ACID LACTONE
Flash point :209 °F
storage temp. :2-8°C
solubility :DMF: 10 mg/ml; DMSO: 10 mg/ml; Ethanol: 10 mg/ml; PBS (pH 7.2): 1 mg/ml
color :Clear colorless
PH Range :4 at 100 g/l at 20 °C
Odor :at 100.00 %. creamy oily fatty caramel
Odor Type :creamy
explosive limit :16%
Water Solubility :MISCIBLE
Merck :13,1596
JECFA Number :219
BRN :105248
Dielectric constant :40.960000000000001
Stability :Stable. Hygroscopic. Incompatible with strong oxidizing agents, strong acids, strong bases, strong reducing agents.
InChIKey :YEJRWHAVMIAJKC-UHFFFAOYSA-N
LogP :-0.566 at 25℃
CAS DataBase Reference :96-48-0(CAS DataBase Reference)
IARC :3 (Vol. 11, Sup 7, 71) 1999
NIST Chemistry Reference :«gamma»-Butyrolactone(96-48-0)
EPA Substance Registry System :.gamma.-Butyrolactone (96-48-0)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310 H336 May cause drowsiness or dizziness Specific target organ toxicity,single exposure; Narcotic effects Category 3 Warning P261, P271, P304+P340, P312,P403+P233, P405, P501
Precautionary statements:	P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.