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CAS RN: 5808-22-0 | Product Number: D0596

Disodium Chromotropate Dihydrate

Purity: >98.5%(T)
  • 1,8-Dihydroxynaphthalene-3,6-disulfonic Acid Disodium Salt Dihydrate
  • Chromotropic Acid Disodium Salt Dihydrate
  • Chromogen C Dihydrate
  • Mordant Brown 7 Dihydrate
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Product Number D0596
Purity / Analysis Method >98.5%(T)
Molecular Formula / Molecular Weight C__1__0H__6Na__2O__8S__2·2H__2O = 400.28  
Physical State (20 deg.C) Solid
Condition to Avoid Light Sensitive
CAS RN 5808-22-0
Related CAS RN 129-96-4
Reaxys Registry Number 3647189
PubChem Substance ID 87567246
Colour Index 57030
MDL Number


Appearance White to Gray to Brown powder to crystaline
Purity(HPLC) min. 97.0 area%
Purity(Neutralization titration) min. 98.5 %(calcd.on anh.substance)
Water 8.0 to 11.0 %
Sulfate max. 0.02%
Suitability for formaldehyde-analysys Abs min. 0.300(near 580nm) in the presence of Formaldehyde(0.6ppm)
Properties (reference)
Solubility in water Soluble
Degree of solubility in water 125 g/l   20 °C
Pictogram Pictogram
Signal Word Warning
Hazard Statements H315 : Causes skin irritation.
H319 : Causes serious eye irritation.
Precautionary Statements P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ eye protection/ face protection.
P302 + P352 : IF ON SKIN: Wash with plenty of water.
P337 + P313 : If eye irritation persists: Get medical advice/ attention.
P305 + P351 + P338 : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P362 + P364 : Take off contaminated clothing and wash it before reuse.
P332 + P313 : If skin irritation occurs: Get medical advice/ attention.
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