D&C Red No. 33 Free Acid
D&C Red No. 33 Free Acid is a synthetic color additive used in pharmaceutical and cosmetic formulations. It serves primarily as a coloring agent to provide visual identification and aesthetic appearance to various products. While it has various industrial and cosmetic applications, it is not used as an active therapeutic agent.
D&C Red No. 33 Free Acid is a dye used for coloring pharmaceutical and cosmetic products rather than providing therapeutic effects.
Key facts at a glance
- RxNorm
- 2672351
- Generic
- D&C Red No. 33 Free Acid
- Class
- pin-variant
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Used as a color additive in oral medications, topical preparations, and cosmetic formulations to provide red coloring for product identification and appearance purposes.
Functions as an inert coloring agent rather than a pharmacologically active compound. The mechanism of action relates to visual pigmentation rather than biological effects.
Primarily used in pharmaceutical formulations as an excipient rather than an active ingredient. Regulatory agencies have approved its use in specific applications and concentrations. As a color additive, it undergoes strict purity testing. Some countries have restrictions on its use in food and cosmetic applications.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy