CAS No 521-24-4 , sodium

Name: sodium
Synonyms: 1,2-Naphthoquinone-4-sulfonic acid sodium salt; 521-24-4;3,4-dioxonaphthalene-1-sulfonate; beta-Naphthoquinone-4-sulfonate sodium salt; EINECS 208-308-9;sodium; Folin's reagent;Sodium 1,2-naphthoquinone-4-sulfonate;
CAS Registry Number:521-24-4
Melting Point: 289 °C (dec.)(lit.)
Water Solubility: H2O: 50 mg/mL, clear
Safety Statements: Moderately toxic by intraperitoneal route. When heated to decomposition it emits toxic fumes of SOx and Na2O.
Hazard Symbols: Xi: Irritant;
EINECS: 208-308-9
Molecular Weight: 260.198469
InchiKey: UBLXEEBHYISRFM-UHFFFAOYSA-M
InChI: InChI=1S/C10H6O5S.Na/c11-8-5-9(16(13,14)15)6-3-1-2-4-7(6)10(8)12;/h1-5H,
(H,13,14,15);/q;+1/p-1
Risk Statements: 36/37/38
Molecular Formula: C₁₀H₅NaO₅S
Molecular Structure:

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References of sodium

Title: Sodium b-Naphthoquinone-4-sulfonate
CAS Registry Number: 521-24-4
CAS Name: 3,4-Dihydro-3,4-dioxo-1-naphthalenesulfonic acid sodium salt
Synonyms: sodium 1,2-naphthoquinone-4-sulfonate; 1,2-naphthoquinone-4-sulfonic acid sodium salt; b-naphthoquinone-4-sulfonic acid sodium salt
Molecular Formula: C10H5NaO5S
Molecular Weight: 260.20
Percent Composition: C 46.16%, H 1.94%, Na 8.84%, O 30.74%, S 12.32%
Literature References: Prepn: Folin, J. Biol. Chem. 51, 377 (1922).
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.