Direct Black 38
- CAS No.
- 1937-37-7
- Chemical Name:
- Direct Black 38
- Synonyms
- CHLORAZOL BLACK E;nsc8679;CI 30235;nsc47756;AZO BLACK;metablack;ERIE BLACK;black2embl;black4embl;erieblackb
- CBNumber:
- CB0745257
- Molecular Formula:
- C34H28N9NaO7S2
- Molecular Weight:
- 761.76
- MDL Number:
- MFCD00066363
- MOL File:
- 1937-37-7.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Product description | Number | Pack Size | Price |
| Chlorazol Black | C1144 | 5g | $45.2 |
| Chlorazol Black | C1144 | 25g | $167 |
| Chlorazol Black E | C0533 | 25g | $76 |
| Ferristatin II | 36621 | 10g | $32 |
| Ferristatin II | 36621 | 25g | $50 |
| More product size | |||
| Melting point | 109-110°C |
|---|---|
| storage temp. | Amber Vial, Refrigerator, Under inert atmosphere |
| solubility | DMSO (Slightly), Methanol (Slightly, Heated), Water (Slightly) |
| Colour Index | 30235 |
| form | Crystalline Powder |
| color | Black |
| Water Solubility | H2O: 1mg/mL |
| Stability | Light Sensitive |
| Major Application |
diagnostic assay manufacturing hematology histology |
| InChIKey | XRPLBRIHZGVJIC-UVHCWRHYSA-L |
| SMILES | [Na+].[Na+].Nc1ccc(\N=N\c2ccc(cc2)-c3ccc(cc3)\N=N\c4c(N)c5c(O)c(\N=N\c6ccccc6)c(cc5cc4S([O-])(=O)=O)S([O-])(=O)=O)c(N)c1 |
| Substances of Very High Concern (SVHC) Candidate List | Disodium 4-amino-3-[[4'-[(2,4-diaminophenyl)azo][1,1'-biphenyl]-4-yl]azo] -5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate (C.I. Direct Black 38) (1937-37-7) |
| CAS DataBase Reference | 1937-37-7(CAS DataBase Reference) |
| EWG's Food Scores | 5 |
| FDA UNII | C7SV16SLWM |
| Proposition 65 List | Direct Black 38 (Technical Grade) |
| EPA Substance Registry System | C.I. Direct Black 38 (1937-37-7) |
| UNSPSC Code | 12171500 |
| NACRES | NA.47 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS07,GHS08 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H319-H350-H361d | |||||||||
| Precautionary statements | P201-P305+P351+P338-P308+P313 | |||||||||
| PPE | Eyeshields, Gloves, type P2 (EN 143) respirator cartridges | |||||||||
| Hazard Codes | T | |||||||||
| Risk Statements | 45-63-36 | |||||||||
| Safety Statements | 53-45-36/37-26 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | QJ6160000 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 29299090 | |||||||||
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
|||||||||
| Hazard Classifications | Carc. 1B Eye Irrit. 2 Repr. 2 |
|||||||||
| Hazardous Substances Data | 1937-37-7(Hazardous Substances Data) | |||||||||
| Toxicity | LD50 orl-rat: 7600 mg/kg TSCAT* OTS 215154 | |||||||||
| NFPA 704 |
|
Direct Black 38 price More Price(46)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | C1144 | Chlorazol Black | 1937-37-7 | 5g | $45.2 | 2026-04-30 | Buy |
| Sigma-Aldrich | C1144 | Chlorazol Black | 1937-37-7 | 25g | $167 | 2026-04-30 | Buy |
| TCI Chemical | C0533 | Chlorazol Black E | 1937-37-7 | 25g | $76 | 2026-04-30 | Buy |
| Cayman Chemical | 36621 | Ferristatin II | 1937-37-7 | 10g | $32 | 2026-04-30 | Buy |
| Cayman Chemical | 36621 | Ferristatin II | 1937-37-7 | 25g | $50 | 2026-04-30 | Buy |
Direct Black 38 Chemical Properties,Uses,Production
Description
Direct black 38 is a black powder. An AZOcompound. Molecular weight= 781.78; Freezing/Meltingpoint $ 400℃. Hazard Identification (based on NFPA-704M Rating System): Health 1, Flammability 1, Reactivity 0.Slightly soluble in water.
Chemical Properties
black crystalline powder
Uses
Chlorozol Black E is a chitin-specific stain and used to detect fungal filaments. Dyes and metabolites, Environmental Testing.Environmental toxin on US EPA Toxic Release Inventory list (TRI) list.
Preparation
4-(4-Aminophenyl)benzenamine double nitriding, in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acidcoupling, aniline diazo, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acidgroup of adjacent a coupling, product again with Benzene-1,3-diamine coupling.
General Description
Gray-black microcrystals or black powder.
Air & Water Reactions
Azo dyes can be explosive when suspended in air at specific concentrations. Slightly soluble in water.
Reactivity Profile
Direct Black 38 is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases may form with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases form with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides. Incompatible with strong acids [NTP, 1992)].
Hazard
Confirmed carcinogen. Moderately toxic by ingestion and inhalation. An eye irritant.
Health Hazard
ACUTE/CHRONIC HAZARDS: Direct Black 38 may be absorbed through the skin. When heated to decomposition it emits very toxic fumes of nitrogen oxides, disodium oxide and sulfur oxides.
Fire Hazard
Flash point data for Direct Black 38 are not available; however, Direct Black 38 is probably combustible.
Safety Profile
Confirmed carcinogen with carcinogenic and tumorigenic data. Moderately toxic by ingestion and inhalation. An eye irritant. Mutation data reported. When heated to decomposition it emits very toxic fumes of NOx, Na2o, and so2.
Potential Exposure
Mutagen; Human Data. Direct black38 is an azo compound and is used to dye fabric, leather,cotton, cellulosic materials, and paper; these are then usedin consumer products. The chemical may be used by artists(CPSC, EPA). The FDA has indicated that although directblack 38 is identified in the literature as a hair-dye component, it is currently not used by the cosmetic industry. Inview of a health hazard alert issued in December 1980 byOSHA, which cautioned workers and employers of the carcinogenic effect of benzidine-derived direct black 38,new nonbenzidine direct black dyes have been developedand used successfully in commercial applications by thepaper and leather industry. These nonbenzidine dyes weredeveloped with the hope of replacing benzidine-based dyesthroughout industry.
First aid
Skin Contact: Flood all areas of the body thathave contacted the substance with water. Do not wait toremove contaminated clothing; do it under the water stream.Use soap to help assure removal. Isolate contaminatedclothing when removed to prevent contact by others. EyeContact: Remove any contact lenses at once. Flush eyeswell with copious quantities of water or normal saline for atleast 2030 min. Seek medical attention. Inhalation: Leavecontaminated area immediately; breathe fresh air. Properrespiratory protection must be supplied to any rescuers. Ifcoughing, difficult breathing or any other symptomsdevelop, seek medical attention at once, even if symptomsdevelop many hours after exposure. Ingestion: If convulsions are not present, give a glass or two of water or milk todilute the substance. Assure that the person’s airway isunobstructed and contact a hospital or poison center immediately for advice on whether or not to induce vomiting.
storage
Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Store in a cool, dry place. Aregulated, marked area should be established where thischemical is handled, used, or stored in compliance withOSHA Standard 1910.1045.
Properties and Applications
black. Palm black powder. Soluble in water for green light black, solubility 40 g/l (85 ℃), and adequate soluble in alcohol for green light blue-black, right amount soluble in soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid is a deep red in blue, diluted Purple dark reddish brown for to red light black precipitation; In nitric acid solution for yellow brown (not completely); In strong hydrochloric acid for dark red light black solution (don’t). The dye solution to join strong hydrochloric acid for Purple dark reddish brown, precipitation; Concentrated sodium hydroxide solution is generated gray light blue precipitaten. Cellulose fiber of dyeing, the dye absorption rate as well, in 80 ℃ temperature when the biggest affinity. Can discharge. Used for cotton, viscose, silk, polyamide fiber and its blending fabric, leather, wood, biological and plastic color, also used as the raw material of black ink.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3 | 3 | 3 | 2 | 2-3 | ||
| AATCC | 3 | 3 | 4-5 | 3 | 2 | ||
Incompatibilities
Azo dyes can form explosive mixtures inair, especially if sensitized with metal salts and/or strongacids. Contact with alkali metals forms explosive gases.Contact with oxidizers and reducing agents forms toxicfumes and gases; also with acids, acryl halides, aldehydes,amides, carbamates, cyanides, epoxides, fluorides (inorganic), halogenated organic materials, isocyanates, ketones,metals, nitrides, peroxides, phenols. May form explosivemixtures with oxidizers, metal salts, peroxides, and sulfides.
Direct Black 38 Preparation Products And Raw materials
Raw materials
1of2
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21533 | 55 |
| career henan chemical co | +86-0371-86658258 | sales@coreychem.com | China | 29766 | 58 |
| SHANDONG ZHI SHANG CHEMICAL CO.LTD | 0531-68652808 18953170293 | sales@sdzschem.com | China | 2921 | 58 |
| CONIER CHEM AND PHARMA LIMITED | sales@conier.com | China | 49906 | 58 | |
| SIMAGCHEM CORP | +86-5922680277 +86-13806087780 | sale@simagchem.com | China | 17339 | 58 |
| TargetMol Chemicals Inc. | +1-781-999-5354; +1-00000000000 | marketing@targetmol.com | United States | 32431 | 58 |
| Dideu Industries Group Limited | +8617392712697 | 1022@dideu.com | China | 29095 | 58 |
| AFINE CHEMICALS LIMITED | +86-571-85134551 +86-18958018566 | info@afinechem.com | China | 15052 | 58 |
| Baoji Guokang Healthchem Co., Ltd. | +86-0917-3909592 +86-13892490616 | gksales1@gk-bio.com | China | 9037 | 58 |
| Dayang Chem (Hangzhou) Co.,Ltd. | +86-0571-88938639 17705817739 | info@dycnchem.com | China | 52693 | 58 |
View Lastest Price from Direct Black 38 manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-07-16 | Direct Black 38
1937-37-7
|
$60.00 | 10g | TargetMol Chemicals Inc. | |||
 |
2026-03-20 | Direct Black 38
1937-37-7
|
$1.00 | 1KG | 99% | 10 mt | Hebei Chuanghai Biotechnology Co., Ltd | |
 |
2022-10-26 | Direct Black EX, Direct Black 38
1937-37-7
|
$2.50 | 25kg | 99% | 20 tons | TIANJIN XIANGRUI DYESTUFF CO.,LTD |
-
- Direct Black 38
1937-37-7
- $60.00
- TargetMol Chemicals Inc.
-
- Direct Black 38
1937-37-7
- $1.00
- 99%
- Hebei Chuanghai Biotechnology Co., Ltd
-
- Direct Black EX, Direct Black 38
1937-37-7
- $2.50
- 99%
- TIANJIN XIANGRUI DYESTUFF CO.,LTD
