Specification
Product Name NAPHTHOL YELLOW S
Synonyms 7-Dinitro-8-hydroxy-2-naphthalenesulfonic acid,
disodium salt; Acid Yellow 1
CAS NO. 846-70-8
C. I. No. 10316
Molecular Formula C10H4N2Na2O8S
Formula Weight 358.18
Appearance A Brownish Orange Powder
Structure
   
Tests    Limits
Dye Content

- 75%

Solubility Of 2 % Solution In D.W.

- Clear And Orange, Exhibits
Yellowish Green Fluorescence

pH (2% Soltn In D.W. Ph=7)

- 7-9

Loss On Drying (135º C For 1hr) - < 5
   
   
REVISED: 1-1-2012  
 
 
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