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SPADNS

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Product Delivery Locations: 
Haldia Port, Kolkata Port Trust, Dhamra Port, Paradip Port

SPADNS

Product Description: 

SPADNS excellent quality manufacturer, exporter and supplier. SPADNS (4,5-Dihydroxy-3-(p-sulfophenylazo)-2,7-naphthalene disulfonic acid, trisodium salt) is indicator for zirconium, thorium and colorimetric indicator for fluoride.

Product Technical Specification: 
C.A.S. No. 23647-14-5
M.F. C16H9N2Na3O11S3
M.W. 570.42gm/mole

Specifications:

Dye Content (by Spectrophotometry) >80%
Solubility 0.1% (Dist. water) Clear solution
Absorption Maximum (water, at pH 7.0)?max 505-510nm
Absorptivity (A1%/1cm in Dist. water, at pH 7.0 at ?max) >375
Loss on drying (110°C) <10%
Product alias: 
SPADNS