CAS · 4430-18-6
Product Overview
Acid Violet 43丨CAS 4430-18-6 is a water-soluble synthetic dye from the triphenylmethane family, primarily used in cosmetic, personal care, and textile applications. Known for its bright violet to deep purple hue, it functions as a colorant in both acidic and aqueous formulations. It is especially valued for its strong tinting strength, good solubility, and stability in pH-sensitive environments.
Product Specifications
| Appearance | Dark purple powder |
|---|---|
| Solubility (in water) | Almost no residues left |
| Substance/Mixture | Substance |
| Tinting Strength | 200% min |
| Acute Toxicity | ivn-mus LD50: 1050 mg/kg |
| Heavy Metals | Pb: ND Cd: ND As: ND |
| Wavelength | Conforms |
| Fluorescent Quantum Yield | Conforms |
| Extinction Coefficient | Conforms |
| Melting/Freezing Point | ≥ 250 °C |
Applications
1. Cosmetics and Personal Care
Used as a color additive in products like:
Shampoos and conditioners
Liquid soaps and bath gels
Hair dyes and temporary hair color sprays
Skin cleansers and lotions
Listed under CI 60730, and accepted in various regions (e.g., EU) for use in rinse-off cosmetics.
2. Hair Colorants
Frequently incorporated into semi-permanent and temporary hair coloring systems.
Delivers brilliant violet shades or acts as a toner to neutralize yellow tones in blonde or gray hair.
Compatible with acidic formulations commonly used in pH-balanced hair treatments.
3. Textile and Leather Dyeing
Occasionally used in wool, silk, and leather dyeing for deep violet shades.
Provides good leveling properties and works best in acidic dye baths.
4. pH Indicator and Analytical Reagent (limited use)
May be used as a colorimetric marker in formulations or tests where pH sensitivity is required.
Suitable for educational demonstrations or as a component of specialty reagents.
Benefits
1. Water-Soluble and Easy to Formulate
Excellent solubility in aqueous and acidic media, making it highly versatile for cosmetic formulations.
Compatible with a wide variety of surfactants and emulsifiers.
2. Color Stability
Retains vivid color in acidic to mildly neutral pH ranges, which is ideal for most personal care products.
Resists fading in rinse-off applications.
3. High Tinting Strength
Requires only small quantities to achieve strong coloration, making it cost-effective.
Can be blended with other dyes for custom shades.
4. Regulatory Acceptance in Some Regions
Listed in the EU Cosmetic Regulation under CI 60730 as a colorant for rinse-off products.
Not currently approved for use in food or ingestible applications.
Conclusion
Acid Violet 43丨CAS 4430-18-6 is a vibrant, water-soluble dye ideal for use in personal care and cosmetic products, especially for hair care and cleansing formulations. Its stability, strong color payoff, and compatibility with acidic environments make it a go-to colorant in commercial and consumer applications. However, due attention must be paid to its regulatory limits and intended external-only usage.
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