4,5-Dihydroxy-3-(p-nitrophenylazo)-2,7-naphthalenedisulfonic acid, disodium salt
Chromotrope 2B
CAS: 548-80-1
Molecular Formula: C16H9N3Na2O10S2
4,5-Dihydroxy-3-(p-nitrophenylazo)-2,7-naphthalenedisulfonic acid, disodium salt - Names and Identifiers
| Name | Chromotrope 2B |
| Synonyms | C.I. 16575 Acid Red 176 Chromotrope 2B Chromotrop 2 B C.I.Acid Red 176 AcidRed176(16575) Chromotropicacid2B Chromotrope Red 4B C.I.Mordant Black 93 C.I. Acid Red 176 (VAN) Acid Red 176~C.I. 16575 P-NITROBENZENE-AZOCHROMOTROPIC ACID C.I. Acid Red 176, disodium salt (8CI) Sodium 2-(p-nitrophenylazo)chromotropate disodium 4,5-dihydroxy-3-(p-nitrophenylazo)naphthalene-2,7-disulphonate 7-naphthalenedisulfonicacid,4,5-dihydroxy-3-[(4-nitrophenyl)azo]-disodium 4,5-Dihydroxy-3-(p-nitrophenylazo)-2,7-naphthalenedisulfonic acid, disodium salt 2,7-Naphthalenedisulfonicacid,4,5-dihydroxy-3-[(4-nitrophenyl)azo-]-,disodiumsalt disodium (3E)-5-hydroxy-3-[2-(4-nitrophenyl)hydrazinylidene]-4-oxo-3,4-dihydronaphthalene-2,7-disulfonate |
| CAS | 548-80-1 |
| EINECS | 208-959-9 |
| InChI | InChI=1/C16H11N3O10S2.2Na/c20-12-7-11(30(24,25)26)5-8-6-13(31(27,28)29)15(16(21)14(8)12)18-17-9-1-3-10(4-2-9)19(22)23;;/h1-7,17,20H,(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2/b18-15-; |
4,5-Dihydroxy-3-(p-nitrophenylazo)-2,7-naphthalenedisulfonic acid, disodium salt - Physico-chemical Properties
| Molecular Formula | C16H9N3Na2O10S2 |
| Molar Mass | 513.37 |
| Melting Point | 300 °C |
| Appearance | Crystalline Powder |
| Color | Dark green to dark purple |
| Merck | 14,2240 |
| BRN | 4109733 |
| Physical and Chemical Properties | Light red-brown powder. Melting point> 300 °c. Soluble in water is light yellow red, insoluble in alcohol. |
4,5-Dihydroxy-3-(p-nitrophenylazo)-2,7-naphthalenedisulfonic acid, disodium salt - 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. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| TSCA | Yes |
4,5-Dihydroxy-3-(p-nitrophenylazo)-2,7-naphthalenedisulfonic acid, disodium salt - Reference Information
| color index | 16575 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | used for analysis and determination of boric acid and borate, inspection of aluminum, calcium and magnesium. |
| production method | p-nitroaniline is subjected to diazotization reaction, and then coupled with sodium chromoturn to obtain chromoacid 2B. |
Last Update：2024-04-09 21:04:16
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