Ingredient Dictionary

BENZIMIDAZOLE

1H-benzimidazole is the 1H-tautomer of benzimidazole.

Definition

1H-benzimidazole is the 1H-tautomer of benzimidazole. It is a benzimidazole and a polycyclic heteroarene. It is a conjugate acid of a benzimidazolide. It is a tautomer of a 4H-benzimidazole, a 2H-benzimidazole and a 3aH-benzimidazole.

Source: PubChem

US FDA substance register · UNII E24GX49LD8 · registered name BENZIMIDAZOLE · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

No declared roleNOT REPORTED

Safety & regulatory references

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

Source: Korea toxic substances GHS register (NIER)

Other restriction: ban substances that deplete the ozone layer

Source: EU CosIng ingredient list

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

Official labels & definitions

JCIA labelling name ベンズイミダゾール: 本品は、次の化学式で表される有機化合物である。

Source: JCIA labelling names (Japan)

Names & identifiers

BENZIMIDAZOLEINCI벤즈이미다졸Korean label name (MFDS standard)1H-BenzimidazoleSynonymベンズイミダゾールJapanese labelling name

CAS No.chemical registry number: 51-17-2
EC No.EU chemical inventory number: 200-081-4
EC No.EU chemical inventory number: 200-181-4
DTXSIDUS EPA chemical ID: DTXSID8024573
DTXCIDUS EPA compound ID: DTXCID704573

IUPAC: 1H-1,3-Benzimidazole
Molecular formula: C7H6N2
Molecular weight: 118.139 g/mol

Measured properties

Appearance: solid
Melting/freezing point: 170.5 ℃
Initial boiling point and range: &amp, gt, 360 ℃
Vapour pressure: 0.0000764 ㎜Hg (25 ℃)
Water solubility: 2010 ㎎/ℓ (Water Solubility 20 ℃)
n-Octanol/water partition coefficient (Kow): 1.32
Molecular weight: 118.14

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 4 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.

Pigment2
Dye1
No specific technical function1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

2 skin studies and 1 eye studies are on record.

Classed as low2

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 3 studies

Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · other guideline: Draize method equivalent or similar to
Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · other guideline: as mentioned below equivalent or similar to
Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: as mentioned below equivalent or similar to