Hair dye HC Red No.10 & No.11

SCA endorses products with the Toxic-Free Tick that do not contain HC Red number 10 & number 11 and/or that contain 2% or less of these dyes in combination of all products applied to the hair simultaneously. In addition, the product label must provide a safety warning as per TGA Poisons Standard states recommendation: "repeated exposure may cause sensitisation" the safety warning is to be supplied on the brands website.


CAS No: 95576-89-9 & 95576-92-4. 1,2-Propanediol, 3-[(4-amino-2-chloro-5-nitrophenyl)amino]-


  • "Restricted in the European Union (EU) under the EU Cosmetics Regulation 1223/2009 Annex III—'List of substances which cosmetic products must not contain except subject to the restrictions laid down'. The maximum concentrations allowed to be applied to hair in non-oxidative and oxidative hair dyes are 2 % and 1 %, respectively (CosIng). The use concentration of these chemicals in hair dyes in Australia is not available to NICNAS. Currently, there are no concentration restrictions in Australia for using these chemicals in hair dyes. Neither chemical, HC Red No. 10 or HC Red No. 11, is listed on the Hazardous Chemical Information System (HCIS) (Safe Work Australia). This Tier III assessment was conducted to determine if risk management recommendations for public health are required for safe use of these chemicals in hair dyes." NICNAS


  • Red synthetic hair dye; commonly used by women to colour the hair a vibrant rich red colour. "In an in vivo percutaneous study (non-guideline)." And, "Results showed a total absorption." And, "Excretion was reported to be 60 % of the absorbed dose in the urine and 40 % in the faeces (SCCS, 2011)." - NICNAS

  • "The available data are limited on relevant critical health end points such as skin sensitisation and carcinogenicity." And, "The chemicals can cause harmful effects following a single oral exposure." - NICNAS

HC Red 13 (INCI):

  • TGA Poisons Standard states "The risk could be controlled by including warning statements on labels for hair dye formulations containing the chemicals at any concentration." TGA suggests that hair dye labels state, "repeated exposure may cause sensitisation".

  • EU Cosmetics Regulation 344/2013 states: usage is acceptable at a maximum concentration of 2.5 % (as hydrochloride salt).

Amina Kitching