Intermediate

Physical Apperance	Grey Powder Form
Chemical Name	Bis-5-Hydroxy 7 Sulphonaphthyl (2)-Amine 6-6 Iminobis-(1-Naphthol-3-Sulphonic Acid)
M.W.	461
CAS. No.	87-03-6
Empirical Formula	C₂₀H₁₅O₈NS₂
Structural Formula
Purity by C.V.	60.00% (Minimum)
HPLC Purity	Less than 1.50%
Dioxy Acid Content	Less than 2.00%
Insolubles	0.50% Maximum
Application	Intermediate for Direct Red 12B & others.

Physical Apperance	Greenish Grey Powder Form
Chemical Name	2 Phenylamine 5Hydroxy Napthalene 7 Sulphonic Acid
M.W.	315
CAS. No.	119-40-4
Empirical Formula	C₁₆H₁₃O₄NS
Structural Formula
Purity by C.V.	90.00% – 93.00% (Minimum)
HPLC Purity	97.00% (Minimum)
Unreacted J.Acid	Less than 1.00%
DI.J Acid (R.W. Acid) Content	Less than 0.50%
Insolubles	0.10%
Application	Intermediate for Direct Violet 51, Direct Violet 9 & others.

Physical Apperance	Greenish Grey Powder Form
Chemical Name	2 Phenylamine 5 Hydroxy Napthalene 7 Sulphonic Acid
M.W.	315
CAS. No.	119-40-4
Empirical Formula	C₁₆H₁₃O₄NS
Structural Formula
Puirity by C.V.	95%- 96% (Minimum)
HPLC Purity	98.5%- 99% (Minimum)
Unreacted J.Acid	0.50% (Maximum)
DI.J Acid (R.W. Acid) Content	Less than 0.10%
Insolubles	Less than 0.10%
Aniline Content	Less than 3500 ppm
Application	Intermediate for Direct Violet 51, DIrect Violet 9 & others.

Chemical Name	N-Ethyl-3-Sulphomethyl-4-Methyl-5 -Carbamoyl-6-Hydroxy-2-Pyridone
Structural Formula
MOLECULAR FORMULA	C₁₀ H₁₄ N₂ O₆S
MOLECULAR WEIGHT	290
COLOUR	Gray White
APPEARANCE	Dry Powder
SOLUBILITY	Soluble In Water, Dilute Alkali, Alcohol
PURITY (BY TITRATION)	80-85%
SYNONYMS	3- Pyridine Methane Sulphonic Acid-5- (Amino Carbonyl) -1-Ethyl-1,2-Dihydro-6- Hydroxy-4-Methyl-2-Oxo 2-Oxo-3-Carbamoyl-4-Methyl-5- Sulphomethyl-6-Hydroxy-N-Ethyl-Pyridine
CAS NUMBER	40306-70-5
IN SOULUBLE	0.1%