8646. Sodium β-Naphthoquinone-4-sulfonate

Nomenclature

CAS number: 521-24-4
3,4-Dihydro-3,4-dioxo-1-naphthalenesulfonic acid sodium salt; sodium 1,2-naphthoquinone-4-sulfonate; 1,2-naphthoquinone-4-sulfonic acid sodium salt; β-naphthoquinone-4-sulfonic acid sodium salt.
C10H5NaO5S; mol wt 260.20.
C 46.16%, H 1.94%, Na 8.84%, O 30.74%, S 12.32%.

Description and references

Prepn: Folin, J. Biol. Chem. 51, 377 (1922).

Chemical structure

Properties

Yellow crystals from dil alc. Readily sol in water; slightly sol in 95% alcohol; moderately sol in acetone; practically insol in ether, chloroform, carbon disulfide, benzene, petr ether. Aq solns fade slowly on exposure to light but may be stabilized by HCl.

Use

Colorimetric determn of amino acids and amines.