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Direct Red 31
Direct Red 31 / CAS : 5001-72-9
| Appearance | Reddish brown powder. The water solubility is good. The aqueous solution is blue red. Add concentrated hydrochloric acid to produce jujube red precipitation, and add concentrated alkali to turn orange brown. | UN | 0.0 |
| HS | 0.0 | DG Class | 0.0 |
| Synonyms | 7,7'-Iminobis[4-Hydroxy-3-(Phenylazo)-2-Naphthalenesulfonic Aci Disodium Sa; Benzo Rhoduline Red B; C.I. Direct Red 31; Chloramine Rose B,Pyrazol Pink 2B; Disodium,(3E)-4-Oxo-7-[[(6E)-5-Oxo-6-(Phenylhydrazinylidene)-7-Sulfonatonaphthalen-2-Yl]Amino]-3-(Phenylhydrazinylidene)Naphthalene-2-Sulfonate; Diphenyl Red Rw; Direct Pink; Nippon Fast Red 2B | ||
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RFQ
Properties
Summary
Formula
C32H21N5Na2O8S2
Molecular Mass
713.64700
Exact Mass
713.06300
PSA
233.09000
Logp
10.02140
IUPAC
disodium;4-hydroxy-7-[(5-hydroxy-6-phenyldiazenyl-7-sulfonatonaphthalen-2-yl)amino]-3-phenyldiazenylnaphthalene-2-sulfonate
SMILES
C1=CC=C(C=C1)N=NC2=C(C=C3C=C(C=CC3=C2O)NC4=CC5=CC(=C(C(=C5C=C4)O)N=NC6=CC=CC=C6)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]
Attribute classification
Matter Classification
organic
Category
Dyestuffs and Pigments > Dyestuff
Chemical and Physical Properties
Appearance
Reddish brown powder. The water solubility is good. The aqueous solution is blue red. Add concentrated hydrochloric acid to produce jujube red precipitation, and add concentrated alkali to turn orange brown.
Export information
HS Code
0.0
UN No.
0.0
DG-Class
0.0
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