CAS no. 633-03-4

Definition: Basic Green 1, also known by its Chemical Abstracts Service (CAS) number 633-03-4, is a synthetic dye used for coloring purposes.

Usage in Cosmetics: Basic Green 1 is used in a variety of cosmetic products to impart color. It may be found in hair dyes, eyeliners, and other cosmetic products where a green pigment is desired.

Other Names/Synonyms:
  • Diamond Green B
  • Victoria Green B

Skin Sensitivities and Allergies:
Some individuals may experience skin sensitivities or allergic reactions when exposed to Basic Green 1. Symptoms can include redness, itching, and irritation. It is always advisable for individuals, particularly those with sensitive skin, to perform a patch test before using products containing this ingredient.

Other Risks:
The use of Basic Green 1 has raised concerns due to its potential toxicity. It's known to be toxic to aquatic organisms and can cause long-term adverse effects in aquatic environments.

Banning (California Ban):
Basic Green 1 has been recently banned in the state of California through Assembly Bill No. 496, Chapter 441, which was approved by the Governor on October 08, 2023, and filed with the Secretary of State on the same date. The bill stipulates that commencing January 1, 2027, no person or entity shall manufacture, sell, deliver, hold, or offer for sale in commerce any cosmetic product that contains Basic Green 1, among other specified ingredients. This ban is part of California's initiative to regulate the use of certain substances in cosmetics to ensure public health and safety. The law acknowledges exemptions for trace quantities of these substances if they are technically unavoidable due to the manufacturing process, storage, or migration from packaging.

How safe is it?

Hang tight. We're thinking.