Naphthalene scarlet B
- CAS NO.：5858-42-4
- Empirical Formula: C20H12N2Na2O7S2
- Molecular Weight: 502.43
- MDL number: MFCD00083025
- EINECS: 2274916
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-09-12 18:49:14
What is Naphthalene scarlet B?
Preparation
6-Aminonaphthalene-2-sulfonic acid diazo, coupled with the 4-Hydroxynaphthalene-1-sulfonic acid.
Properties and Applications
red. Soluble in water for yellow light red. The strong sulfuric acid for product red, diluted for scarlet solution, then become yellow brown precipitation. Join the hydrochloric acid in aqueous solution after yellow brown precipitation; Add sodium hydroxide solution don’t change color.
| Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
| Fading | Stain | Fading | Stain | Fading | Stain | |||
| ISO | 3 | 3 | 4-5 | 4 | 1 | 3-4 | 3 | 1 |
Safety information for Naphthalene scarlet B
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