Alcohols & Glycols
REACH
Thioglycerol
CAS Number
96-27-5
EC Number
202-495-0
Abbreviation
MTG
What is Thioglycerol?
Thioglycerol (CAS 96-27-5), also known as MTG, is a sulfur-containing diol.
Where is Thioglycerol used?
- Pharmaceutical manufacturing: stabilizer of oxidation-prone active ingredients, extending shelf life in injectable and topical formulations
- Hair treatment products: thiol group breaks and reforms disulfide bonds to reshape hair structure
- Cosmetic preparations: humectant that helps products retain moisture and maintain texture
- Specialty chemical synthesis: cross-linking agent and intermediate for thioether compounds in polymer and resin systems
- It functions as a reducing agent and stabilizer.
Good to know: Pharmaceutical-grade material meets USP and BP specifications; technical-grade material serves industrial synthesis.
Commercial specifications
- Packaging from small laboratory quantities to bulk drums
Other Names (Synonyms)
1-mercapto-2,3-propanediol|3-mercaptopropane-1,2-diol|alpha-thiolglycerol|3-mercapto-1,2-propanediol|2,3-dihydroxypropanethiol|1-thioglycerol|1-thio-2,3-propanediol|1-monothioglycerol|MTG
What are the physical properties of Thioglycerol?
Melting Point <25 °C
Boiling Point 118 °C @ Press: 5 Torr
Density 1.295 g/cm³
Flash Point >230 °F
Appearance clear colorless to yellowish viscous solution
Color Clear colorless to yellow
Odor Stench odour
Form liquid
Water Solubility slightly soluble
Vapor Pressure <1 hPa (20 °C)
Refractive Index n 20/D 1.527(lit.)
pH 3.5-7.0
Log P -0.84 at 20℃
How is Thioglycerol classified and handled safely? Learn More
Danger
GHS06· Toxic GHS07· Irritant
Hazard Statements
H302 Harmful if swallowed
H311 Toxic in contact with skin
H315 Causes skin irritation
H317 May cause an allergic skin reaction
Precautionary Statements
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P262 Do not get in eyes, on skin, or on clothing.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
Which trade and regulatory codes apply to Thioglycerol?
HS Code 29309070
UN Number 2810
ADR Class 6.1
Packing Group III
Storage Class 6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects
WGK (Germany) 3