Ingredient
CI 42053
CI 42053 is flagged for pregnancy and general use. The concern behind the strongest flag is absorbed into the body.
- Acid Green 9
- Fast Green FCF
- Green S
- FD&C Green No. 3
Verdict by profile
Truva checks every ingredient against six profiles. Jump to any of them for the full assessment.
- Strongest verdict
- Caution Advised
- Its verdict for pregnancy, the profile this one is worst in
- Profiles flagged
- 2 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 2 of 5
- Higher means more likely to sting or redden
CI 42053 and pregnancy
Caution Advised
- Absorbed into the body
CI 42053 (Fast Green FCF) is a synthetic triarylmethane dye used to provide green coloration in cosmetic products. It's commonly found in bath products, shampoos, and makeup formulations. While specific pregnancy studies on topical use are limited, this synthetic dye has raised concerns due to animal studies showing potential toxicity at high doses. Some synthetic colorants can be absorbed through the skin, particularly in products that remain on the skin for extended periods or in formulations designed to penetrate (like bath products). The concern is heightened during pregnancy due to increased skin permeability and the potential for any absorbed substance to cross the placental barrier. Additionally, this dye has been associated with allergic reactions and skin irritation, which may be more problematic during pregnancy when skin sensitivity often increases. Many dermatologists and obstetricians recommend minimizing exposure to synthetic dyes during pregnancy when possible, particularly those with limited safety data. While CI 42053 is not explicitly banned for use during pregnancy, a precautionary approach suggests choosing products without synthetic colorants or opting for naturally-derived color additives. The EU restricts this dye's use in products applied near mucous membranes, indicating recognition of absorption concerns.
CI 42053 and breastfeeding
Safe to Use
CI 42053 is a synthetic green dye used for cosmetic coloration. When used in rinse-off products or makeup applied to areas away from the breast, absorption and transfer to breast milk is minimal. While data on transfer to breast milk is limited, the topical use of synthetic dyes in cosmetics generally results in minimal systemic absorption. The primary concerns are skin irritation and allergic reactions rather than milk transfer. However, products applied directly to the breast area should be avoided or thoroughly removed before breastfeeding. This ingredient can be used with caution during breastfeeding, particularly in products that don't remain on the skin or that are applied away from the breast area. Dermatologists generally consider synthetic dyes in cosmetics to pose minimal risk to breastfed infants when used in typical cosmetic applications.
CI 42053 and postpartum
Safe to Use
- Irritant
- Common allergen
CI 42053 is a synthetic colorant that may cause skin irritation or allergic reactions in sensitive individuals. Postpartum skin can be more sensitive due to hormonal changes. This ingredient has no specific concerns for postpartum use beyond general skin sensitivity. If irritation occurs, discontinue use and choose products with mineral-based colorants instead.
CI 42053 and trying to conceive
Safe to Use
CI 42053 is a synthetic colorant with minimal systemic absorption when used topically in cosmetics. While animal studies at high doses have raised some toxicity concerns, cosmetic use involves much lower exposure. This ingredient is considered low-risk for women trying to conceive based on typical cosmetic use patterns. However, as a precautionary measure, some women may choose to limit exposure to synthetic dyes before conception, particularly if using products with high dye concentrations or extended skin contact.
CI 42053 and PCOS
Safe to Use
CI 42053 is a synthetic dye used solely for cosmetic coloration. It has no known effects on hormones, insulin sensitivity, or androgen levels. There are no concerns with this ingredient for women with PCOS. It does not interfere with hormone balance or contribute to PCOS-related skin issues. This ingredient is safe for women with PCOS from a hormonal perspective, though individuals with sensitive or acne-prone skin should be aware of potential irritation from synthetic dyes.
CI 42053 and general use
Caution Advised
- Common allergen
- Irritant
CI 42053 (also known as Fast Green FCF, Green S, or FD&C Green No. 3) is a synthetic triarylmethane dye that provides vibrant green coloration to cosmetic products. It's water-soluble and commonly used in bath products, shampoos, soaps, and makeup. This synthetic dye can cause allergic contact dermatitis and skin irritation in some individuals, particularly those with sensitive skin or pre-existing allergies to synthetic dyes. Animal studies have shown potential toxicity at high doses, though the relevance to typical cosmetic use is debated. The ingredient has been associated with cross-reactivity in people allergic to other triarylmethane dyes. CI 42053 has varied regulatory status worldwide. In the EU, it's approved for use in cosmetics but restricted from products applied to mucous membranes. It's approved in the US for use in drugs and cosmetics but not as a food additive. Several countries have banned its use due to safety concerns. Consumers sensitive to synthetic dyes or seeking to minimize synthetic additive exposure may prefer products colored with mineral pigments like iron oxides or mica.
Everything else flagged for the same profiles
Related ingredients
Ingredients suggested in place of CI 42053, 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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