At a Glance
Material Family
Acids & Salts
Record Type
mono-constituent
Primary Role
Conditioning · Synthesis Intermediate
Solubility
Soluble in ethanol; practically insoluble in ether
Functional Roles
Industries Served
Applications & Use Cases
- ▸ Reducing agent and dough conditioner / flour treatment agent in baking (E920)
- ▸ Reducing agent in permanent-wave and keratin hair treatments
- ▸ Reducing agent for keratin and wool/textile processing
- ▸ Antioxidant and processing aid in food and beverage applications
- ▸ Biochemical reagent and synthesis intermediate (amino-acid building block)
Physical Properties
Appearance
White crystalline powder
Odor
Characteristic / faint sulfurous odor
Hygroscopicity
Hygroscopic
Melting Point
~175 °C (with decomposition)
Water Solubility
Freely (very) soluble in water
Solubility
Soluble in ethanol; practically insoluble in ether
pH
Acidic; ~1.5-2.0 (1% aqueous solution, hydrochloride salt)
Specific Rotation
[a]D approx +5 to +7 deg (L-isomer, in dilute HCl)
Safety & Handling
Full SDS available on request
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →
Chemical Identity
CAS Number
52-89-1
Molecular Formula
C3H8ClNO2S
Molecular Weight
157.62 g/mol
IUPAC Name
(2R)-2-amino-3-sulfanylpropanoic acid;hydrochloride
PubChem CID
InChI Key
IFQSXNOEEPCSLW-DKWTVANSSA-N
Synonyms & Trade Names
Full Description
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 200-157-7
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
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Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.