Ingredient
Basic Brown 17
Basic Brown 17 is flagged for pregnancy, breastfeeding, postpartum, trying to conceive, PCOS and general use. The concern behind the strongest flag is carcinogen concern and absorbed into the body.
- CI 12251
- Bismark Brown Y
- C.I. Basic Brown 17
Verdict by profile
Truva checks every ingredient against six profiles. Jump to any of them for the full assessment.
- Strongest verdict
- Not Recommended
- Its verdict for pregnancy, the profile this one is worst in
- Profiles flagged
- 6 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 2 of 5
- Higher means more likely to sting or redden
Basic Brown 17 and pregnancy
Not Recommended
- Carcinogen concern
- Absorbed into the body
- Fetal development
Basic Brown 17 is a synthetic azo dye used in hair coloring products that has been identified as potentially carcinogenic and mutagenic by regulatory toxicologists. The compound can be absorbed through the scalp during hair dyeing, particularly when the scalp is irritated or compromised. The European Union's Scientific Committee on Consumer Safety concluded that Basic Brown 17 poses unacceptable risks and banned it from cosmetic use in 2006. The concern stems from positive genotoxicity tests and structural similarity to known carcinogens. During pregnancy, exposure to mutagenic substances is particularly concerning due to potential effects on rapidly dividing fetal cells. While human pregnancy data is limited, the precautionary principle strongly supports avoiding all known or suspected mutagens and carcinogens during pregnancy. The EU ban on this ingredient reflects regulatory consensus that it poses unacceptable health risks. The American College of Obstetricians and Gynecologists recommends pregnant women minimize exposure to potential carcinogens and mutagens. Most pregnancy-safe beauty guidelines advise avoiding hair dyes containing banned EU ingredients. Products containing Basic Brown 17 should be completely avoided during pregnancy.
Basic Brown 17 and breastfeeding
Not Recommended
- Passes into breast milk
- Infant exposure
- Carcinogen concern
Basic Brown 17 is a banned hair dye ingredient in the EU due to carcinogenic and mutagenic potential. The compound can be absorbed systemically through the scalp, and as a relatively small synthetic molecule, it has the potential to transfer into breast milk. The primary concerns for breastfeeding mothers are systemic absorption during hair dye application and subsequent infant exposure through breast milk. Given the ingredient's classification as a potential carcinogen and mutagen, even minimal infant exposure should be avoided. The immature metabolic systems of infants make them particularly vulnerable to toxic compounds that adults might better tolerate. The AAD and most dermatologists recommend that breastfeeding mothers avoid hair dyes containing known carcinogens or mutagens. The EU ban on Basic Brown 17 reflects strong scientific evidence of harm that extends to the breastfeeding period. Natural or semi-permanent hair dyes that don't contain banned azo dyes are safer alternatives for lactating women.
Basic Brown 17 and postpartum
Not Recommended
- Carcinogen concern
- Common allergen
Basic Brown 17 should be avoided by all individuals, including postpartum women not breastfeeding. The ingredient's classification as a potential carcinogen and mutagen makes it unsuitable for any cosmetic use regardless of reproductive status. The EU ban on this ingredient is based on serious health concerns that apply to all users. Even for women not currently pregnant or breastfeeding, exposure to known or suspected carcinogens should be minimized. The scalp's rich blood supply facilitates absorption of hair dye ingredients, increasing systemic exposure to potentially harmful compounds.
Basic Brown 17 and trying to conceive
Not Recommended
- Carcinogen concern
- Fertility effects
- Builds up in tissue
Women trying to conceive should avoid Basic Brown 17 completely. The ingredient's mutagenic properties raise concerns about potential effects on egg quality and early embryonic development. Since conception timing is often uncertain, avoiding known mutagens during the preconception period is essential. Mutagenic compounds can potentially damage DNA in reproductive cells, though specific fertility data for Basic Brown 17 is lacking. The precautionary approach recommended for pregnancy extends to the preconception period. Most fertility specialists advise minimizing exposure to potential carcinogens and mutagens when trying to conceive, similar to pregnancy guidance.
Basic Brown 17 and PCOS
Not Recommended
- Carcinogen concern
- Common allergen
Basic Brown 17 should be avoided by all women, including those with PCOS. The ingredient's carcinogenic and mutagenic potential makes it unsuitable for use regardless of hormonal status or skin concerns. Women with PCOS do not have specific sensitivities to this dye beyond general population concerns, but the ingredient should still be completely avoided due to its banned status in the EU and identified health risks. The concern is not hormone-related but rather about cancer risk and genetic damage. Safe hair coloring alternatives exist that do not contain banned azo dyes or suspected carcinogens. Women with PCOS should choose hair dyes that comply with EU cosmetic regulations, which have the strictest safety standards globally.
Basic Brown 17 and general use
Not Recommended
- Carcinogen concern
- Common allergen
Basic Brown 17 is banned in the European Union and should be avoided by all consumers. The SCCS concluded that this azo dye poses unacceptable mutagenic and carcinogenic risks based on positive genotoxicity tests and structural similarity to known carcinogens. In addition to cancer concerns, Basic Brown 17 is a known contact allergen that can cause allergic reactions, particularly with repeated exposure. The ingredient can sensitize the immune system, leading to increasingly severe reactions over time. The combination of cancer risk and allergenic potential led to its prohibition in EU cosmetics. Consumers should check ingredient lists and avoid products containing Basic Brown 17 (also listed as CI 12251 or Bismark Brown Y). While it may still appear in some products manufactured outside the EU, there are numerous safer hair dye alternatives available that do not contain banned ingredients. The EU Cosmetics Regulation provides the gold standard for cosmetic safety, and ingredients banned in the EU should be avoided globally.
Everything else flagged for the same profiles
Related ingredients
Ingredients suggested in place of Basic Brown 17, each one with its own page here.
Ingredients that raise the same concerns.
Where this came from
Truva summarises published guidance from bodies including ACOG, the FDA, the EU SCCS and the Cosmetic Ingredient Review. It has no access to your medical history and it is not a substitute for your doctor, dermatologist or midwife. These assessments have not been reviewed by a clinician, and nothing here is a diagnosis or a prescription. If you are pregnant, breastfeeding or being treated for PCOS, take the ingredient list to the person looking after you.
Assessment last pulled from the ingredient database on .
One ingredient is the easy case.
A label has thirty of them. Truva reads the whole list at once and answers for the profile you set: pregnancy, breastfeeding, postpartum, trying to conceive, PCOS, or general use.
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