123333-68-6

Basic information

• Product Name: 2-SULFOBENZOIC ACID HYDRATE
• Synonyms: 2-SULFOBENZOIC ACID HYDRATE;2-SULPHOBENZOIC ACID HYDRATE;O-SULFOBENZOIC ACID N-HYDRATE;o-Sulphobenzoic Acid;o-Sulfobenzoic Acid Hydrate
• CAS NO: 123333-68-6
• Molecular Formula: C7H8O6S
• Molecular Weight: 220.2
• EINECS: 211-176-5
• Mol File: 123333-68-6.mol
• Article Data: 1

Chemical Properties

• Melting Point: 78-80°C
• Boiling Point: 568.6 °C at 760 mmHg
• Flash Point: 297.7 °C
• Appearance: /
• Vapor Pressure: 9.14E-14mmHg at 25°C
• Sensitive: Hygroscopic
• BRN: 2106852
• CAS DataBase Reference: 2-SULFOBENZOIC ACID HYDRATE(CAS DataBase Reference)
• NIST Chemistry Reference: 2-SULFOBENZOIC ACID HYDRATE(123333-68-6)
• EPA Substance Registry System: 2-SULFOBENZOIC ACID HYDRATE(123333-68-6)

Safety Data

• Hazard Codes: C
• Statements: 34
• Safety Statements: 26-27-28-36/37/39-45
• RIDADR: UN 3261 8/PG 2
• WGK Germany: 3
• TSCA: Yes
• HazardClass: 8
• PackingGroup: III
• Hazardous Substances Data: 123333-68-6(Hazardous Substances Data)

Usage

Purification Methods

Crystallise the acid from water. The S-benzylisothiuronium salt has m 205.5-206.5o (from aqueous EtOH). [Beilstein 1 H 369, 1 II 215, 1 III 658.]

InChI:InChI=1/C7H6O5S.H2O/c8-7(9)5-3-1-2-4-6(5)13(10,11)12;/h1-4H,(H,8,9)(H,10,11,12);1H2

Relevant articles and documents

Process for preparing isocyanates

A process for preparing isocyanates comprising contacting carbon dioxide and a primary amine in the presence of an aprotic organic solvent and a base selected from the group consisting of a phosphazene compound, an organic, nitrogenous base and mixtures thereof, wherein the organic, nitrogenous base selected from the group consisting of guanidine compounds, amidine compounds, tertiary amines and mixtures thereof to produce the corresponding ammonium carbamate salt, reacting the ammonium carbamate salt with an anhydride dehydrating agent to produce a product stream comprising the corresponding isocyanate, the aprotic organic solvent and the base salt derived from the anhydride, separating the base salt from the product stream, recovering and recycling the base, and regenerating and recycling the anhydride dehydrating agent.