6644. Nitroso-R Salt

Nomenclature

CAS number: 525-05-3

3-Hydroxy-4-nitroso-2,7-naphthalenedisulfonic acid disodium salt; sodium salt of 1-nitroso-2-hydroxynaphthalene-3,6-disulfonic acid.

C₁₀H₅NNa₂O₈S₂; mol wt 377.26.

C 31.84%, H 1.34%, N 3.71%, Na 12.19%, O 33.93%, S 17.00%.

Golden-yellow, fan-shaped crystals. Sol in ≈40 parts water; more sol in hot water; slightly sol in methyl or ethyl alcohol.

As a reagent for cobalt and potassium.