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Gamma butyrolactone

CAS number 96-48-0

General

Synonyms: 4-hydroxybutyric acid gamma-lactone, gamma-6480, agrisynth blo, gamma-bl, blo, blon, 4-butanolide, 1,2-butanolide, 1,4-butanolide, gamma-4-hydroxy-butyric acid, butyric acid lactone, butyrolactone, alpha-butyrolactone, 4-butyrolactone, butyryl lactone, 4-deoxytetronic acid, dihydro-2(3H)-furanone, gamma-hydroxybutyric acid cyclic ester, 2-oxolanone, tetrahydro-2-furanone
Use: synthetic reagent, ingredient in some paint removers.


Molecular formula: C4H6O2
CAS No: 96-48-0
EINECS No: 202-509-5

Physical data

Appearance: colourless oily liquid
Melting point: -45 C
Boiling point: 204 - 206 C
Vapour density:
Vapour pressure: 1.5 mm Hg at 20 C
Density (g cm-3): 1.12
Flash point: 98 C (closed cup)
Explosion limits: 1.4 - 16%
Autoignition temperature:
Water solubility:

Stability

Stable. Hygroscopic. Incompatible with strong oxidizing agents, strong acids, strong bases, strong reducing agents.

Toxicology

Inhalation may be harmful. Harmful if swallowed. Severe skin irritant.

Toxicity data
ORL-RAT LD50 1540 mg kg-1
IPR-RAT LD50 1000 mg kg-1
ORL-MUS LD50 1720 mg kg-1
IPR-MUS LD50 1100 mg kg-1
SKN-GPG LD50 > 5000 mg kg-1
IVN-RBT LDLO 500 mg kg-1

Personal protection
Safety glasses, adequate ventilation.

Gamma-Butyrolactone is a hygroscopic colorless oily liquid with a weak characteristic odor and is soluble in water.

GBL is a common solvent and reagent in chemistry and is used as an aroma compound, as a stain remover, as a superglue remover, as a paint stripper, and as a solvent in some wet aluminium electrolytic capacitors.GBL has been found in extracts from samples of unadulterated wines.

This finding indicates that GBL is a naturally occurring component in some wines and may be present in similar products.

The concentration detected was approximately 5 μg/mL and was easily observed using a simple extraction technique followed by GC/MS analysis.

Effects: Journalists have long been calling GHB liquid ecstasy. This is incorrect - the effects are similar, but different: warm fuzzy feeling, chattiness, increased energy, ability to stay awake longer, overwhelming horniness, emotional intensity.

It is not for nothing that GBL took off in the sx clubs and spread to more mainstream users from there. It's been described as 'a lovely mellow buzz that leaves you functional and normal, but completely at ease with the world'.

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