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Ingredient Dictionary

TOLUENE-2,5-DIAMINE

2-methyl-1,4-phenylenediamine is a diamine in which the two amino groups are substituted into toluene at the 2- and 5-positions.

Korean limit
2.0%
Molecular structure

Definition

2-methyl-1,4-phenylenediamine is a diamine in which the two amino groups are substituted into toluene at the 2- and 5-positions. It has a role as an allergen. It derives from a hydride of a toluene.

Source: PubChem

US FDA substance register · UNII 24JO8Z0RJU · registered name TOLUENE-2,5-DIAMINE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Dyes hairHAIR DYEING

Safety & regulatory references

Restricted
South Korea · United Kingdom

Source: ASEAN Cosmetic Directive · EU Cosmetics Regulation · Health Canada Cosmetic Ingredient Hotlist · MFDS (Korea) cosmetic regulatory information · Taiwan FDA cosmetic ingredients · Taiwan FDA cosmetic regulations · UK cosmetics regulations (OPSS)

ASEAN

  • Field of application and/or use : Hair dye substance in oxidative hair dye products Use for dyeing eyelashes and eyebrows is not permitted.
  • Other limitations and requirements : 1. and 2. After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 4% calculated as free base
  • Conditions of use and warning which must be printed on the labels : To be printed on the label: The mixing ratio “Hair colourants can cause severe allergic reactions. Read and follow instructions. This product is not intended for use on persons under the age of 16. Temporary ‘black henna’ tattoos may increase your risk of allergy. Do not colour your hair if: - you have a rash on your face or sensitive, irritated and damaged scalp, - you have ever experienced any reaction after colouring your hair, - you have experienced a reaction to a temporary ‘black henna’ tattoo in the past. Contains phenylenediamines. (toluene diamines). Do not use to dye eyelashes or eyebrows.”

Canada

  • Conditions of Use by product type : (a) Not permitted in the area of the eye as indicated in section 14 of the Cosmetic Regulations. (b) In hair dyes as indicated in section 22 of the Cosmetic Regulations.
  • Warnings and Cautionary Statements: (to the effect of) : On the inner label and the outer label of the cosmetic:“CAUTION: this product contains ingredients that may cause skin irritation on certain individuals and a preliminary test according to accompanying directions should first be made. This product must not be used for dying the eyelashes or eyebrows. To do so may cause blindness.” Instructions to the following effect accompany each package of hair dye: (i) The preparation may cause serious inflammation of the skin in some persons, and a preliminary test should always be carried out to determine whether or not special sensitivity exists; and (ii) To make the test, a small area of skin behind the ear or on the inner surface of the forearm should be cleansed, using either soap and water or alcohol, and a small quantity of the hair dye, as prepared for use, should be applied to the area and allowed to dry. After 24 hours, the area should be washed gently with soap and water. If no irritation or inflammation is apparent, it is usually assumed that no hypersensitivity to the dye exists. The test should, however, be carried out before each application. On no account should the hair dye be used for dyeing eyebrows or eyelashes as severe inflammation of the eye or even blindness may result.”

Taiwan

  • 3.6%

China

  • Maximum concentration : 4%

European Union

  • Product Type, body parts : Hair dye substance in oxidative hair dye products (a) General use (b) Professional use For (a) and (b): After mixing under oxidative conditions the maximum concentration to hair must not exceed 4% calculated as free base.
  • Other : (a) and (b) After mixing under oxidative conditions the maximum concentration applied to hair must not exceed 4% calculated as free base
  • Wording of conditions of use and warnings : (a) Hair colorants can cause severe allergic reactions. Read and follow instructions. This product is not intended for use on persons under the age of 16. Temporary "black henna" tattoos may increase your risk of allergy. Do not colour your hair if: - you have a rash on your face or sensitive, irritated and damaged scalp, - you have ever experienced any reaction after colouring your hair, - you have experienced a reaction to a temporay "black henna" tattoo in the past. Contains phenylenediamines (toluenediamines). Do not use to dye eyelashes or eyebrows. The mixing ratio is printed on the label (b) For professional use only Hair colorants can cause severe allergic reactions. Read and follow instructions. This product is not intended for use on persons under the age of 16. Temporary "black henna" tattoos may increase your risk of allergy. Do not colour your hair if: - you have a rash on your face or sensitive, irritated and damaged scalp, - you have ever experienced any reaction after colouring your hair, - you have experienced a reaction to a temporay "black henna" tattoo in the past. Contains phenylenediamines (toluenediamines). Wear suitable gloves. The mixing ratio is printed on the label

Source: MFDS (Korea) cosmetic regulatory information

Korea’s toxic-substance GHS classification: Danger · H332 (category 4) · H301 (category 3) · H411 (category 2) · +2 more

Source: Korea toxic substances GHS register (NIER)

Restriction III/9a · SCCS opinion: Opinion on Toluene-2 5-diamine and its sulfate; Opinion on Toluene-2,5-diamine

Source: EU CosIng ingredient list

Reviewed by CIR: Final Report on the Safety Assessment of Toluene-2,5-Diamine, Toluene-2,5-Diamine Sulfate, and Toluene-3,4-Diamine

Source: US Cosmetic Ingredient Review (CIR)

Reviewed by CIR: Final Amended Report of the Safety Assessment of Toluene-2,5-Diamine, Toluene-2,5-Diamine Sulfate and Toluene-3,5-Diamine as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

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

Names & identifiers

TOLUENE-2,5-DIAMINEINCI1,4-Benzenediamine, 2-methyl-Synonym톨루엔-2,5-디아민Korean label name (MFDS standard)
CAS No.chemical registry number
95-70-5
EC No.EU chemical inventory number
202-442-1
DTXSIDUS EPA chemical ID
DTXSID6029123
DTXCIDUS EPA compound ID
DTXCID707869
IUPAC
2-Methylbenzene-1,4-diamine
Molecular formula
C7H10N2
Molecular weight
122.171 g/mol

Measured properties

Appearance
Other Solid · Colorless plates, [HSDB]
Boiling point
273.5 °C
Melting point
64 °C
Solubility
Soluble in water, ethanol, ethyl ether, slightly soluble in benzene, acetic acid
Colour
colourless
Melting/freezing point
64 ℃
Initial boiling point and range
273.5 ℃
Flash point
140 ℃
Vapour pressure
0.0037 ㎜Hg
Water solubility
72500 ㎎/ℓ
n-Octanol/water partition coefficient (Kow)
0.16
Molecular weight
122.17

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: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 3 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.

  • Dye3

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

7 skin studies and 3 eye studies are on record.

Classed as moderate1

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 10 studies
  • Skin Sens. 1
    Skin Sensitization · Authoritative
  • Category 1
    Skin Sensitization · Screening
  • Sh
    Skin Sensitization · Authoritative
  • Category 3
    Skin Irritation · Screening
  • High Frequency of Sensitization
    skin sensitisation: in vivo (non-LLNA) · Screening · according to OECD Guideline 406 (Skin Sensitisation) Magnusson and Kligman
  • Ambiguous
    skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to
  • Moderate or Mild Irritation
    skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to other guideline: Code of Federal Regulations, Title 16, Section 1500.41 according to
  • Category 2A-2B
    Eye Irritation · Screening
  • Studies Indicate No Significant Irritation
    eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to other guideline: Code of Federal Regulations, Title 16, Section 1500.42 according to
  • Severe Irritation
    eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to

Source: US EPA CompTox dashboard

Related literature

Linked databases 28