Direct Black 38
CAS No. : 1937-37-7
(Synonyms: Chlorazol Black E; Ferristatin II (disodium); C.I. 30235)
| Size | Price | Stock |
|---|---|---|
| 1g | $30 | In-stock |
| 5g | $50 | In-stock |
| 10g | $75 | In-stock |
| 25g | $120 | In-stock |
| 50 g | Get quote | |
| 100 g | Get quote | |
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| Cat. No. : | HY-D0256 |
| M.Wt: | 781.73 |
| Formula: | C34H25N9Na2O7S2 |
| Purity: | >98 % |
| Solubility: | DMSO : 25 mg/mL (ultrasonic);H2O : 5 mg/mL (ultrasonic) |
Direct Black 38 (Chlorazol Black E) is a benzidine-based azo dye, a substrate of Enterococcus gallinarum, and is mainly used for textile dyeing. Direct Black 38 is biodegradable after being reduced by microbial enzymes (such as Enterococcus gallinarum azoreductase), breaking the azo bonds and releasing benzidine and 4-aminobiphenyl. Direct Black 38 can be used in environmental toxicology, wastewater treatment and carcinogenicity studies, but its metabolite benzidine is listed as a human carcinogen[1].
In Vitro:In the basal medium experiment, Direct Black 38 (25-100 mg/L; 24 h) is decolorized by 53-63% by Enterococcus gallinarum, releasing benzidine and 4-aminobiphenyl[1].
In the Luria broth experiment, Direct Black 38 (20-250 mg/L; 48 h) achieves a decolorization rate of 71-85%, with higher biomass efficiency, in line with Monod kinetics (Vmax=12.8 mg·L-1·h-1), Ks=490.6 mg·L-1)[1].
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