S P E C I F I C A T I O N S

2,(4-SULFOPHENYLAZO)-1,8-DIHYDROXY-3,6-NAPHTHALENE-DISULFONIC ACID, TRISODIUM SALT (SPADNS) ACS

Synonyms:		4,5-Dihydroxy-3-(4-Sulfophenylazo)-2,7-naphthalenedisulfonic
			Acid trisodium salt; SPADNS; p-Sulfophenylazochromotropic
			Acid trisodium salt

CAS No.:				23647-14-5

Formula:				C16H9N2Na3O11S3

F.W.:					570.42

Appearance:				Red to brown powder

Clarity of Solution:			To pass test

Lambda Max:			507 (307)nm in water

Sensitivity to fluoride:		To pass test

Effective: 12/16/08