Ingredient Dictionary

MERCAPTOPROPIONIC ACID

3-mercaptopropanoic acid is a mercaptopropanoic acid that is propanoic acid carrying a sulfanyl group at position 3.

How much products actually contain

No product states its amount yet.

Of the products containing it, 2 list it before the 1% line and 0 after it (usually 1% or less).

Products using this ingredient

2 of 2 confirmed · likeliest to carry enough first

Definition

3-mercaptopropanoic acid is a mercaptopropanoic acid that is propanoic acid carrying a sulfanyl group at position 3. It has a role as an algal metabolite. It is a conjugate acid of a 3-mercaptopropionate.

Source: PubChem

US FDA substance register · UNII B03TJ3QU9M · registered name 3-Mercaptopropionic acid · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Curls or straightens hairHAIR WAVING OR STRAIGHTENINGReduces other ingredientsREDUCINGDissolves hair to remove itDEPILATORY

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name メルカプトプロピオン酸: 本品は、次の化学式で表される含硫化合物である。

Source: JCIA labelling names (Japan)

Names & identifiers

MERCAPTOPROPIONIC ACIDINCI머캅토프로피오닉애씨드Korean label name (MFDS standard)Propanoic acid, 3-mercapto-Synonymメルカプトプロピオン酸Japanese labelling name

CAS No.chemical registry number: 107-96-0
CAS No.chemical registry number: 30232-12-3
EC No.EU chemical inventory number: 203-537-0
DTXSIDUS EPA chemical ID: DTXSID8026775
DTXCIDUS EPA compound ID: DTXCID106775

IUPAC: 3-Sulfanylpropanoic acid
Molecular formula: C3H6O2S
Molecular weight: 106.14 g/mol

Measured properties

Appearance: liquid
Colour: colourless
Melting/freezing point: 17~19 ℃
Initial boiling point and range: 110~112 ℃
Flash point: &amp, gt, 98 ℃
Upper/lower flammability or explosive limits: - / 1.6 %
Vapour pressure: 0.0498 ㎜Hg (at 25℃)
Water solubility: 119000 ㎎/ℓ
Relative density: 1.218
n-Octanol/water partition coefficient (Kow): 0.43
Auto-ignition temperature: 350 ℃
Molecular weight: 106.14

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: KOSHA safety data sheets (Korea)

What products actually use it for

What the 8 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Plasticizer2
Flavouring and nutrient1
Depilatory (EPA)1
Hair waving or straightening (EPA)1
Reducing agent1
Intermediate1
Processing aids not otherwise specified1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

4 skin studies and 3 eye studies are on record.

Classed as highly irritating1

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 7 studies

Category 1
Skin Irritation · Screening
Classification not possible
Skin Sensitization · Screening
SkinSens1
Skin Sensitization · QSAR Predicted
Category 8.2C (Category 1C)
Skin Irritation · Read Across
Category 1
Eye Irritation · Screening
Category 8.3A (Category 1)
Eye Irritation · Read Across
Corrosive or Irritation Persists for > 21 days
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to