Arin LogoArin
Back

ACID BLUE 9

CAS
3844-45-9
PubChem CID
19700
Molecular Formula
C37H34N2Na2O9S3
Molecular Weight
792.9000 g/mol

Dihydrogen (ethyl)[4-[4-[ethyl(3-sulphonatobenzyl)]amino]-2'-sulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene](3-sulphonatobenzyl)ammonium, disodium salt (CI 42090)

What does it do?

Provides a blue color to the product.

Details

Dihydrogen (ethyl)[4-[4-[ethyl(3-sulphonatobenzyl)]amino]-2'-sulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene](3-sulphonatobenzyl)ammonium, disodium salt (CI 42090)

a shiny glass trophy cup on a blue background with the reflection of it's handle
Ingredient guide

Acid Blue 9: The Blue Dye in Your Hair Color

You've seen "Acid Blue 9" on a hair dye ingredient list. The same substance appears as E133 on food labels. What do we know about this synthetic blue dye?

Read the full guide →

Function & Use

Hair Dyeing

Cosmetic Colorant

Regulatory note

  • EU 1223/2009 Annex IIIRestricted

    Maximum concentration: 0.5%

The verdict isn’t ours: below is what ToxValDB (EPA Toxicity Value Database), EPA ToxCast (high-throughput in vitro screening), IARC (International Agency for Research on Cancer), SCCS (EU Scientific Committee on Consumer Safety) said, verbatim.

What The Sources Say

SCCS (EU Scientific Committee on Consumer Safety)1
Safety assessment

EU 1223/2009 Annex III - SCCS opinion: Opinion on Acid Blue 9

IARC (International Agency for Research on Cancer)1
General assessmentView source →

IARC Grup 3 - Kanserojenliği sınıflandırılamıyor. The available evidence is insufficient for a classification. This does NOT mean 'safe'; it means 'not enough data'. (Monograph volume: 16, Sup 7). Sınır: IARC TEHLİKE sınıflandırması yapar, RİSK değil - 'bir koşulda kansere yol açabilir' der, 'kozmetikteki kullanım seviyesinde kanser yapar' DEMEZ. Maruziyet yolu ve dozu ayrıca değerlendirilmelidir. Data is a 01/2021 snapshot.

ToxValDB (EPA Toxicity Value Database)7
Hazard claimView source →

EPA ToxValDB skin/eye data - endpoint: skin sensitisation: in vivo (LLNA), classification: Not likely to be sensitizing, species: mouse, study: skin sensitization, guideline: equivalent or similar to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay), year: 2004. Caveat: this is an aggregated record; dose, species and route of exposure must be considered together.

Hazard claimView source →

EPA ToxValDB skin/eye data - endpoint: eye irritation: in vivo, classification: Studies Indicate No Significant Irritation, species: rabbit, study: eye irritation, guideline: OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to, year: 1982. Caveat: this is an aggregated record; dose, species and route of exposure must be considered together.

Hazard claimView source →

EPA ToxValDB skin/eye data - endpoint: skin irritation: in vivo, classification: Studies Indicate No Significant Irritation, species: rabbit, study: skin irritation, guideline: OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to, year: 1982. Caveat: this is an aggregated record; dose, species and route of exposure must be considered together.

Hazard claim

EPA ToxValDB genotoxicity: positive - positive reports: 14, negative: 6, Ames: positive, micronucleus: positive. Caveat: this is an aggregated record; dose, species and route of exposure must be considered together.

Hazard claimView source →

EPA ToxValDB kanser değerlendirmesi: 3 - Not classifiable as to its carcinogenicity to humans. Caveat: this is an aggregated record; dose, species and route of exposure must be considered together.

+2 more records.

EPA ToxCast (high-throughput in vitro screening)1
Safety assessmentView source →

EPA ToxCast ER model: NO estrogen receptor activity found (AUC agonist=0, antagonist=0.000382). Tested in 18 in vitro assays. Caveat: this is an in vitro screening model with no dose or exposure context; it does NOT mean an effect occurs in humans at cosmetic use levels.

Scientific References

Products Containing This Ingredient