226017

1,2-Naphthoquinone-4-sulfonic acid sodium salt

97%

• Synonym(s): 3,4-Dihydro-3,4-dioxo-1-naphthalenesulfonic acid sodium salt, Folin’s reagent, Sodium 1,2-naphthoquinone-4-sulfonate
• Empirical Formula (Hill Notation): C₁₀H₅NaO₅S
• CAS Number: 521-24-4
• Molecular Weight: 260.20
• Beilstein: 4169788
• EC Number: 208-308-9
• MDL number: MFCD00001700
• UNSPSC Code: 12352100
• PubChem Substance ID: 24853538
• NACRES: NA.22

Properties

• Assay: 97%
• form: powder
• mp: 289 °C (dec.) (lit.)
• solubility: alcohol: slightly soluble 95%; acetone: moderately soluble(lit.); benzene: insoluble(lit.); carbon disulfide: insoluble(lit.); chloroform: insoluble(lit.); diethyl ether: insoluble(lit.); petroleum ether: insoluble(lit.); water: soluble(lit.)
• functional group: ketone
• SMILES string: [Na+].[O-]S(=O)(=O)C1=CC(=O)C(=O)c2ccccc12
• 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
• InChI key: UBLXEEBHYISRFM-UHFFFAOYSA-M

Description

Application

1,2-Naphthoquinone-4-sulfonic acid sodium salt (Folin′s reagent) was used in the colorimetric assay for determination of procaine hydrochloride in pharmaceutical preparations.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves