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Ingredients

Ingredient Dictionary

GLYCERYL THIOGLYCOLATE

Glyceryl monothioglycolate is a thioglycolate ester resulting from esterification of thioglycolic acid with glycerol.

Molecular structure

Definition

US FDA substance register · UNII 0FWE72AF2P · registered name GLYCERYL MONOTHIOGLYCOLATE · mixture

Source: US FDA Unique Ingredient Identifier (UNII)

Glyceryl monothioglycolate is a thioglycolate ester resulting from esterification of thioglycolic acid with glycerol. As a component of developer solutions in permanent wave products, it is the second most frequent allergen in hairdressers and avoidance of acid permanent waves is mandatory. It has a role as an allergen.

Source: PubChem

Mercaptoacetic acid, monoester with propane-1,2,3-triol

Cosmetic roles

Curls or straightens hairHAIR WAVING OR STRAIGHTENING

Safety & regulatory references

Restricted
China

Source: MFDS (Korea) cosmetic regulatory information

Argentina · Brazil

  • Field of application and/or use : Products for straightening or waving hair: 1. General use 2. Professional use
  • Maximum concentration permitted at final product : 1. 8% ready to use pH 6 to 9,5 2.11% ready to use pH 6 to 9.5 The percentages are calculated as thioglycolic acid
  • Other limitations and requirements : 1) and 2) In the USAGE must consist obligatorily the following information: - May cause sensitization by skin contact. - Avoid contact with eyes. - In case of contact with eyes, rinse immediately and thoroughly with water and consult a doctor. - Wear suitable gloves
  • Use conditions and warnings that must appear on the label : 1) and 2) Contains thioglycolate Follow the instructions Keep out of reach of children. For professional use only (if applicable)

ASEAN

  • Field of application and/or use : Hair waving or straightening products: 1. General use 2. Professional use
  • Maximum authorised concentration in the finished cosmetic product : 1. 8% ready for use at pH 6-9.5 2. 11% ready for use at pH 6-9.5 Percentages calculated as thioglycolic acid.
  • Other limitations and requirements : The directions for use drawn up in the national or official language(s) must obligatorily incorporate the following sentences: • May cause sensitisation in the event of skin contact. • Avoid contact with eyes. • In the event of contact with eyes, rinse immediately with plenty of water and seek medical advice. • Wear suitable gloves.
  • Conditions of use and warning which must be printed on the labels : • Contains thioglycolate. • Follow the instructions. • Keep out of reach of children. • For professional use only.

European Union

  • Product Type, body parts : Hair waving or straightening products
  • Maximum concentration in ready for use preparation : (a) 8% (b) 11% The abovementioned percentages are calculated as thioglycollic acid
  • Other : (a) General use ready for use pH 6 to 9.5 (b) Professional use ready for use pH 6 to 9.5
  • Wording of conditions of use and warnings : Conditions of use: (a) (b) May cause sensitization in the event of skin contact Avoid contact with eyes In the event of contact with eyes, rinse immediately with plenty of water and seek medical advice Wear suitable gloves Warnings: Contains thioglycolate Follow the instructions Keep out of reach of children (b) For professional use only

Source: MFDS (Korea) cosmetic regulatory information

Not classified under Korea’s toxic-substance GHS list

Source: Korea toxic substances GHS register (NIER)

Health Canada Cosmetic Ingredient Hotlist · prohibited in cosmetics

Source: Health Canada Cosmetic Ingredient Hotlist

Restriction III/2b

Source: EU CosIng ingredient list

Reviewed by CIR: Final Report on the Safety Assessment of Ammonium and Glyceryl Thioglycolates and Thioglycolic Acid

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Final Amended Report on the Safety Assessment of Ammonium Thioglycolate, Butyl Thioglycolate, Calcium Thioglycolate, Ethanolamine Thioglycolate, Ethyl Thioglycolate, Glyceryl Thioglycolate, Isooctyl Thioglycolate, Isopropyl Thioglycolate, Magnesium Thioglycolate, Methyl Thioglycolate, Potassium Thioglycolate, Sodium Thioglycolate, and Thioglycolic Acid

Source: US Cosmetic Ingredient Review (CIR)

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

Official labels & definitions

JCIA labelling name チオグリコール酸グリセリル: 本品は、チオグリコール酸(*)とグリセリン(*)のモノエステルであり、次の化学式で表される。

Source: JCIA labelling names (Japan)

Names & identifiers

GLYCERYL THIOGLYCOLATEINCI글리세릴티오글라이콜레이트Korean label name (MFDS standard)Acetic acid, mercapto-, monoester with 1,2,3-propanetriolSynonymチオグリコール酸グリセリルJapanese labelling name
CAS No.chemical registry number
30618-84-9
EC No.EU chemical inventory number
250-264-8
DTXSIDUS EPA chemical ID
DTXSID2027965

Measured properties

Appearance
Colorless viscous liquid with a mild sulfurous odor, [Lanza Research MSDS]

Values measured on the substance itself, not a specification for a commercial raw material.

Source: PubChem

What products actually use it for

What the 1 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.

  • Hair waving or straightening (EPA)1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

6 skin studies and 2 eye studies are on record.

Classed as highly irritating1Classed as low3

The studies disagree (the most common conclusion covers 25%), so they do not establish that this ingredient is irritating. These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 8 studies
  • Studies Indicate No Significant Irritation
    skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
  • SkinSens1
    Skin Sensitization · QSAR Predicted
  • Sh
    Skin Sensitization · Authoritative
  • Not likely to be sensitizing
    skin sensitisation: in vivo (non-LLNA) · Screening · according to OECD Guideline 406 (Skin Sensitisation)
  • High Frequency of Sensitization
    skin sensitisation: in vivo (non-LLNA) · Screening · according to OECD Guideline 406 (Skin Sensitisation)
  • Category 6.3A (Category 2)
    Skin Irritation · Read Across
  • Studies Indicate No Significant Irritation
    eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to
  • Studies Indicate No Significant Irritation
    eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to

Source: US EPA CompTox dashboard

Related literature

Linked databases 19