EU/US Properties Organoleptics Cosmetics Suppliers Safety Safety in use Safety references References Other Blenders Uses Occurrence Synonyms Articles Notes

3-mercaptopropionic acid
3-thiopropionic acid

Supplier Sponsors

CAS Number: 107-96-0Picture of molecule3D/inchi
ECHA EINECS - REACH Pre-Reg:203-537-0
Nikkaji Web:J38.166G
Beilstein Number:0773807
CoE Number:11709
XlogP3:0.40 (est)
Molecular Weight:106.14422000
Formula:C3 H6 O2 S
BioActivity Summary:listing
NMR Predictor:Predict (works with chrome, Edge or firefox)
Category:flavoring agents
US / EU / FDA / JECFA / FEMA / FLAVIS / Scholar / Patent Information:
Google Scholar:Search
Google Books:Search
Google Scholar: with word "volatile"Search
Google Scholar: with word "flavor"Search
Google Scholar: with word "odor"Search
Perfumer and Flavorist:Search
Google Patents:Search
US Patents:Search
EU Patents:Search
Pubchem Patents:Search
JECFA Food Flavoring:1936 3-mercaptopropionic acid
FEMA Number:4587 3-mercaptopropionic acid
FDA:No longer provide for the use of these seven synthetic flavoring substances
Physical Properties:
Appearance:colorless to pale yellow clear oily liquid (est)
Assay: 98.00 to 100.00
Food Chemicals Codex Listed: No
Specific Gravity:1.22000 to 1.22600 @ 20.00 °C.
Pounds per Gallon - (est).: 10.163 to 10.213
Refractive Index:1.49000 to 1.49600 @ 20.00 °C.
Melting Point: 17.00 to 18.00 °C. @ 760.00 mm Hg
Boiling Point: 110.00 to 111.00 °C. @ 15.00 mm Hg
Boiling Point: 216.00 to 218.00 °C. @ 760.00 mm Hg
Vapor Pressure:0.051000 mmHg @ 25.00 °C. (est)
Flash Point: 199.00 °F. TCC ( 92.78 °C. )
logP (o/w): 0.430
Soluble in:
 water, 1.194e+005 mg/L @ 25 °C (est)
Organoleptic Properties:
Odor and/or flavor descriptions from others (if found).
Cosmetic Information:
CosIng:cosmetic data
Cosmetic Uses: depilatories
hair straightening agents
hair waving agents
reducing agents
BOC Sciences
For experimental / research use only.
beta-Mercaptopropionic Acid 99%
3-Mercaptopropionic Acid
Odor: characteristic
Use: MPA's unique reducing properties make it an ideal candidate for a wide variety of chemical reactions including addition, elimination, or cyclization reactions. MPA's thiol-group (-SH) will react in the presence of bases, acids, ketone groups or organic halogens. In the presence of alcohols or amines, the carboxylic group will react preferentially.
EMD Millipore
For experimental / research use only.
3-Mercaptopropionic Acid
Glentham Life Sciences
3-Mercaptopropionic acid
Kowa Amerian Corporation
Odor: characteristic
Use: 3-MPA is widely used in food and beverage industries as a flavoring agent. It is used in the production of PVC stabilizers, which are used as chain transfer agents in polymerizations. It can be used as primary or secondary, color stabilizer in combination with phenolic antioxidant for polymers.
3-mercaptopropionic acid
Penta International
Santa Cruz Biotechnology
For experimental / research use only.
3-Mercaptopropionic Acid ≥98%
Sigma-Aldrich: Aldrich
For experimental / research use only.
3-Mercaptopropionic acid ≥99%
For experimental / research use only.
3-Mercaptopropionic Acid >98.0%(GC)(T)
Safety Information:
Preferred SDS: View
European information :
Most important hazard(s):
T - Toxic.
R 25 - Toxic if swallowed.
R 34 - Causes burns.
S 01/02 - Keep locked up and out of the reach of children.
S 07 - Keep container tightly closed.
S 20/21 - When using do not eat, drink or smoke.
S 23 - Do not breath vapour.
S 24/25 - Avoid contact with skin and eyes.
S 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S 36/37/39 - Wear suitable clothing, gloves and eye/face protection.
S 45 - In case of accident or if you feel unwell seek medical advice immediately.
Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
oral-rat LD50 96 mg/kg
Tin Research Institute, Publication. Vol. -, Pg. 1, 1973.

intraperitoneal-rat LD50 66 mg/kg
Agents and Actions, A Swiss Journal of Pharmacology. Vol. 1(5), Pg. 231, 1970.

intraperitoneal-mouse LD50 38120 ug/kg
Current Toxicology. Vol. 1, Pg. 199, 1993.

Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined
Safety in Use Information:
flavoring agents
Recommendation for 3-mercaptopropionic acid usage levels up to:
 not for fragrance use.
Use levels for FEMA GRAS flavoring substances on which the FEMA Expert Panel based its judgments that the substances are generally recognized as safe (GRAS).
The Expert Panel also publishes separate extensive reviews of scientific information on all FEMA GRAS flavoring substances and can be found at FEMA Flavor Ingredient Library
publication number: 24
Click here to view publication 24
 average usual ppmaverage maximum ppm
baked goods: 0.001005.00000
beverages(nonalcoholic): --
beverages(alcoholic): --
breakfast cereal: --
cheese: 0.001005.00000
chewing gum: --
condiments / relishes: --
confectionery froastings: --
egg products: --
fats / oils: 0.001005.00000
fish products: --
frozen dairy: 0.001000.00500
fruit ices: --
gelatins / puddings: --
granulated sugar: --
gravies: --
hard candy: 0.001000.00500
imitation dairy: --
instant coffee / tea: --
jams / jellies: --
meat products: --
milk products: --
nut products: --
other grains: --
poultry: --
processed fruits: --
processed vegetables: --
reconstituted vegetables: --
seasonings / flavors: --
snack foods: 0.001005.00000
soft candy: --
soups: --
sugar substitutes: --
sweet sauces: --
Safety References:
EPI System: View
AIDS Citations:Search
Cancer Citations:Search
Toxicology Citations:Search
EPA Substance Registry Services (TSCA):107-96-0
EPA ACToR:Toxicology Data
EPA Substance Registry Services (SRS):Registry
Laboratory Chemical Safety Summary :6514
National Institute of Allergy and Infectious Diseases:Data
WGK Germany:1
3-sulfanylpropanoic acid
RTECS:UF5270000 for cas# 107-96-0
 3-sulfanylpropanoic acid
NIST Chemistry WebBook:Search Inchi
Canada Domestic Sub. List:107-96-0
Pubchem (cid):6514
Pubchem (sid):134972743
Other Information:
(IUPAC):Atomic Weights of the Elements 2011 (pdf)
Videos:The Periodic Table of Videos
tgsc:Atomic Weights use for this web site
(IUPAC):Periodic Table of the Elements
FDA Substances Added to Food (formerly EAFUS):View
UM BBD:Search
HMDB (The Human Metabolome Database):HMDB41604
Export Tariff Code:2930.90.4920
FAO:3-Mercaptopropionic acid
Potential Blenders and core components note
None Found
Potential Uses:
 depilating agents
 hair straightening agents
 hair waving agents
 reducing agents
Occurrence (nature, food, other):note
 not found in nature
 hydracrylic acid, 3-thio-
2-mercaptoethanecarboxylic acid
3-mercaptopropanoic acid
beta-mercaptopropionic acid
 propanoic acid, 3-mercapto-
 propanoicacid, 3-mercapto-
 propionic acid, 3-mercapto-
3-sulfanylpropanoic acid
3-thiohydracrylic acid
3-thiolpropanoic acid
3-thiopropanoic acid
3-thiopropionic acid


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an inhibitor of glutamate decarboxylase. it decreases the gamma-aminobutyric acid concentration in the brain, thereby causing convulsions. Flavouring agent [CCD]
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