C.I. Mordant Red 7
eriochrome red B
CAS: 3618-63-1
Molecular Formula: C20H15N4NaO5S
C.I. Mordant Red 7 - Names and Identifiers
| Name | eriochrome red B |
| Synonyms | C.I. 18760 Mordant Red 7 Eriochromered eriochrome red B Acid Chrome Red B Acid Mordant Red B C.I.Mordant Red 11 C.I. Mordant Red 7 C.I. Mordant Red 7, monosodium salt (8CI) sodium 3-hydroxy-4-[(E)-(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)diazenyl]naphthalene-1-sulfonate (4Z)-4-[(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl)hydrazono]-3-oxo-3,4-dihydronaphthalene-1-sulfonic acid sodium (4Z)-4-[2-(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl)hydrazinylidene]-3-oxo-3,4-dihydronaphthalene-1-sulfonate |
| CAS | 3618-63-1 |
| EINECS | 222-811-0 |
| InChI | InChI=1/C20H16N4O5S.Na/c1-12-18(20(26)24(23-12)13-7-3-2-4-8-13)21-22-19-15-10-6-5-9-14(15)17(11-16(19)25)30(27,28)29;/h2-11,18,21H,1H3,(H,27,28,29);/q;+1/p-1/b22-19- |
C.I. Mordant Red 7 - Physico-chemical Properties
| Molecular Formula | C20H15N4NaO5S |
| Molar Mass | 446.41 |
| Appearance | Red-like crystals |
| Storage Condition | Sealed in dry,Room Temperature |
| MDL | MFCD00004080 |
| Physical and Chemical Properties | Chemical properties blue light red powder. Soluble in water, slightly soluble in ethanol and acetone. Its aqueous solution is yellow to brownish red, and diluted sulfuric acid is added to turn it into red and orange; concentrated caustic soda is turned into brilliant red. It is rose red in concentrated sulfuric acid and turns orange after dilution; the color disappears in concentrated nitric acid. When dyeing, copper and iron are encountered, and the color and light changes. |
| Use | It is used for dyeing and printing of wool, silk and its fabrics, and also can dye nylon and its blended fabrics. The finished wool dyeing product is subjected to ultraviolet light, and the color and light are changed. The color of the finished wool dyeing product is darkened to purple by post-medium method, and the color of the finished wool dyeing product is colored to wine red by pre-medium method. |
C.I. Mordant Red 7 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 3 |
C.I. Mordant Red 7 - Upstream Downstream Industry
C.I. Mordant Red 7 - Nature
| color index | 18760 |
| EPA chemical information | 1-Naphthalenesulfonic acid, 4-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-3-hydroxy-, monosodium salt (3618-63-1) |
Last Update：2024-04-10 22:29:15
C.I. Mordant Red 7 - Production method
After diazotization of 1,2,4-acid (I. e. 1-amino -2-naphthol -4-sulfonic acid), it is coupled with 1-phenyl-3-methylpyrazolone, and then through salting out, filtration, drying and other processing processes, this product is prepared. The dyeing fastness of this product on wool: sun exposure level 5, soaping, washing and sweat stains level 5, carbonization level 4, cooking level 4-5, ironing level 3. Raw material consumption (kg/t)1,2, 4-acid 335 sodium nitrite 1151-phenyl-3-methyl-5-pyrazolone 260 200 hydrochloride soda ash 300 caustic soda 70 sodium sulfate 4
Last Update：2024-04-10 22:29:15
Supplier List
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Spot supply
Product Name: Eriochrome Red b Visit Supplier Webpage Request for quotationCAS: 3618-63-1
Tel: 18301782025
Email: 3008007409@qq.com
Mobile: 18021002903
QQ: 3008007409
Wechat: 18301782025
View History
Raw Materials for C.I. Mordant Red 7
Sodium hydroxide
1-Amino-2-naphthol-4-sulfonic acid
1-Diazo-2-naphthol-4-sulfonic acid
3-Methylpyrazole
1-AMINO-2-NAPHTHOL-4-SULFONIC ACID
1-Amino-2-naphthol-4-sulfonic acid
1-Diazo-2-naphthol-4-sulfonic acid
3-Methylpyrazole
1-AMINO-2-NAPHTHOL-4-SULFONIC ACID