C.I. Acid Red No. 14
Chromotrope FB
CAS: 3567-69-9
Molecular Formula: C20H12N2Na2O7S2
C.I. Acid Red No. 14 - Names and Identifiers
| Name | Chromotrope FB |
| Synonyms | Azorubin Carmoisine C.I. 14720 Acid Red 14 Chromotrope FB C.I. Food Red 3 C.I.Acid Red 14 C.I. Acid Red 14 Acid Red 14 (14720) C.I. Acid Red No. 14 C.I. Acid Red 14, disodium salt C.I. Acid Red 14, disodium salt (8CI) disodium 4-[(2Z)-2-(1-oxo-4-sulfonatonaphthalen-2(1H)-ylidene)hydrazino]naphthalene-1-sulfonate |
| CAS | 3567-69-9 |
| EINECS | 222-657-4 |
| InChI | InChI=1/C20H14N2O7S2.2Na/c23-20-15-8-4-3-7-14(15)19(31(27,28)29)11-17(20)22-21-16-9-10-18(30(24,25)26)13-6-2-1-5-12(13)16;;/h1-11,21H,(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2/b22-17-; |
C.I. Acid Red No. 14 - Physico-chemical Properties
| Molecular Formula | C20H12N2Na2O7S2 |
| Molar Mass | 502.43 |
| Melting Point | >300ºC |
| Flash Point | >225℃ |
| Water Solubility | Soluble in water |
| Solubility | Easily soluble in water, soluble in ethanol in a red solution, slightly soluble in acetone |
| Appearance | Form neat, color Red brown |
| Storage Condition | 2-8℃ |
| MDL | MFCD00003978 |
| Physical and Chemical Properties | Chemical properties red powder or particles. Soluble in water. Slightly soluble in ethanol. |
| Use | Use 1, edible red pigment. 2. It is mainly used for dyeing wool fabric, which is colored with Chrome salt medium. Nylon can be dyed in an acetic acid bath. It can be used in the manufacture of lakes and inks, and in the dyeing of leather, paper, wood, electrochemical aluminum, medicine, biology and cosmetics. Dark blue AGLO, an acid medium, was formed with acid lake blue A. Its heavy metal salts can be used as organic pigments. |
C.I. Acid Red No. 14 - 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 | 2 |
| RTECS | QK1925000 |
| TSCA | Yes |
| Toxicity | LD50 oral in rat: > 10gm/kg |
C.I. Acid Red No. 14 - Nature
| color index | 14720 |
| Odor | Odorless |
| (IARC) Carcinogen Classification | 3 (Vol. 8, Sup 7) 1987 |
| EPA chemical information | C. I. Acid Red 14, disodium salt (3567-69-9) |
Last Update：2024-04-10 22:29:15
C.I. Acid Red No. 14 - Production method
1.1, 1, 4-aminonaphthalene sulfonic acid (naphthionic acid) and NW acid are used as raw materials, 1, 4-aminonaphthalene sulfonic acid is diazotized, and the product is coupled with NW acid. The finished product is salted out, filtered and dried..
Add 1000L of water and 200kg 1,4-naphthalenesulfonic acid to a diazo pot, stir and dissolve. Then 492kg of hydrochloric acid (15%) is added, the temperature is reduced to 0 ℃, 30% sodium nitrite solution (containing NaNO2 57.6kg) is added, the temperature is controlled below 25 ℃, and the diazonium solution is obtained for 1.5h.
Add 1250L of water, 192kg of soda ash and 89kg NW acid to the coupling pot, stir and dissolve, cool to 15 ℃, slowly add the above diazonium solution within 2 hours, finish the addition, and stir until the diazonium salt disappears. Continue to stir for 3 hours, raise the temperature to 65-70 ℃, add salt for salting out, filter, dry and crush to obtain the finished product.
2, 1,4-naphthalenesulfonate sodium diazotization, coupled with NW acid (1-naphthol -4-sulfonic acid), salting out. 1. Diazotization Dissolve 200 kg1,4 sodium aminonaphthalenesulfonate in 1000L of water. Add 492kg of 15% hydrochloric acid. Precipitation of milky white crystals. Add 30% sodium nitrite solution (fold 100 W.6kg) from the liquid surface when cold to 10 ℃, and control the feeding temperature below 25 ℃ to make starch sulfonated potassium test paper slightly blue and keep it for 1.5h. 1,4-naphthalenesulfonic acid diazonium salt solution. 2. Add 1250ml of water, 192kg of soda ash and 89kg of NW acid into the coupling barrel, and stir to dissolve all. Cold to 15 ℃, slowly add the above diazonium salt solution within 2 hours, and the feeding temperature shall not exceed 25 ℃. After adding, determine pH = 8.5 and stir for 30min. The end point is the disappearance of diazonium salt and NW acid should be slightly excessive. After reaching the finish line, stir for another 3 hours. Raise the temperature to 65-70 ℃, add salt and salt according to volume 23%. Filtering. The filter cake was dried, crushed and standardized to obtain 620kg of acid red B dye finished product. Raw material consumption (kg/t)NW acid (100%) 323 sodium carbonate (98%) 2681, sodium 4-aminonaphthalenesulfonate (100%) 340 hydrochloric acid (31%) 369 sodium nitrite (98%) 98 refined salt 597
Last Update：2024-04-10 22:29:15
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