7474-78-4

Basic information

• Product Name: 3,4-Diaminobenzenesulfonic acid
• Synonyms: BIS(N-BUTYL) SEBACATE;DI-N-BUTYL SEBACATE;DIBUTYL DECANEDIOATE;DECANEDIOIC ACID DIBUTYL ESTER;DBS;BUTYL SEBACATE;FEMA 2373;1,2-PHENYLENEDIAMINE-4-SULFONIC ACID
• CAS NO: 7474-78-4
• Molecular Formula: C₆H₈N₂O₃S
• Molecular Weight: 188.2
• EINECS: 203-672-5
• Product Categories: Intermediates of Dyes and Pigments
• Mol File: 7474-78-4.mol
• Article Data: 10

Chemical Properties

• Melting Point: -12 °C
• Boiling Point: 178-179 °C3 mm Hg(lit.)
• Flash Point: >230 °F
• Appearance: /
• Density: 0.936 g/mL at 25 °C(lit.)
• Refractive Index: n20/D 1.441(lit.)
• Storage Temp.: -20°C
• Solubility: hexane, toluene, ethanol and acetone: soluble
• PKA: -0.52±0.50(Predicted)
• CAS DataBase Reference: 3,4-Diaminobenzenesulfonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4-Diaminobenzenesulfonic acid(7474-78-4)
• EPA Substance Registry System: 3,4-Diaminobenzenesulfonic acid(7474-78-4)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36
• WGK Germany: 1
• RTECS: VS1150000
• Hazardous Substances Data: 7474-78-4(Hazardous Substances Data)

Usage

General Description

3,4-Diaminobenzenesulfonic acid, also known as 3,4-diaminobenzenesulphonic acid, is an organic compound with the chemical formula C6H8N2O5S. It is a derivative of aniline and is commonly used in the production of dyes and pigments. The compound is a water-soluble solid that is often used in the synthesis of azo dyes, which are widely used in the textile industry. Additionally, 3,4-diaminobenzenesulfonic acid has been utilized in the production of pharmaceuticals, as well as in analytical chemistry as a reagent for determining nitrite and nitrate levels in water samples. It is important to handle this chemical with care as it can cause irritation to the skin, eyes, and respiratory system if not used properly.

InChI:InChI=1/C6H8N2O3S/c7-5-2-1-4(3-6(5)8)12(9,10)11/h1-3H,7-8H2,(H,9,10,11)

Upstream product

• 95-54-5 1,2-diamino-benzene 
• 103-84-4 Acetanilid 
• 88-74-4 2-nitro-aniline 
• 1025698-05-8 2,2'-dinitro-azobenzene-4,4'-disulfonic acid 
• 7647-01-0 hydrogenchloride 
• 7664-93-9 sulfuric acid 
• 615-28-1 o-phenylenediamine dihydrochloride 
• 39145-59-0 o-phenylenediamine hydrochloride 
• 616-84-2 2-nitroaniline-4-sulfonic acid 

Downstream Products

• 72895-01-3 cis-dichloro(3,4-diaminobenzenesulfonic acid)platinum(II) 
• 1611449-83-2 C₂₀H₁₆N₂O₇S 
• 1611449-81-0 C₃₄H₄₂N₄O₇S 
• 1394971-66-4 2,3-bis(4-methoxyphenyl)-N-methylquinoxaline-6-sulfonamide 
• 1394971-68-6 2,3-bis(4-methoxyphenyl)quinoxaline-6-sulfonic acid 
• 1394971-67-5 2,3-bis(4-methoxyphenyl)-6-(morpholinosulfonyl)quinoxaline 
• 1394971-65-3 2,3-bis(4-methoxyphenyl)quinoxaline-6-sulfonamide 
• 27503-81-7 2-phenyl-1H-benzimidazole-5-sulfonic acid 

Relevant articles and documents

Decoupled Redox Catalytic Hydrogen Production with a Robust Electrolyte-Borne Electron and Proton Carrier

Electrolytic water splitting is an effective approach for H2 mass production. A conventional water electrolyzer concurrently generates H2 and O2 in neighboring electrode compartments separated by a membrane, which brings about compromised purity, energy efficiency, and system durability. On the basis of distinct redox electrochemistry, here, we report a system that enables the decoupling of both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) from the electrodes to two spatially separated catalyst bed reactors in alkaline solutions. Through a pair of close-loop electrochemical-chemical cycles, the system operates upon 7,8-dihydroxy-2-phenazinesulfonic acid (DHPS) and ferricyanide-mediated HER and OER, respectively, on Pt/Ni(OH)2 and NiFe(OH)2 catalysts. Near unity faradaic efficiency and sustained production of hydrogen has been demonstrated at a current density up to 100 mA/cm2. The superior reaction kinetics, particularly the HER reaction mechanism of DHPS as a robust electrolyte-borne electron and proton carriers, were scrutinized both computationally and experimentally. We anticipate the system demonstrated here would provide an intriguing alternative to the conventional water electrolytic hydrogen production.

SULFONATION IN CONTINUOUS-FLOW MICROREACTORS

A continuous flow process for sulfonating 1,2.diaminobenzene comprises introducing a sulfonation mixture into a microreactor inlet of a continuous flow microreactor to produce a flow of the sulfonation mixture through the continuous flow microreactor. The sulfonation mixture comprises 1,2 aminobenzene dissolved in a molar excess of sulfuric acid. The continuous flow microreactor comprises one or more individual fluidic modules each having various features with respect to channel width and thermal management. The process further comprises maintaining a reaction temperature of from about 150.230 degC in at least a portion of the individual fluidic modules while the sulfonation mixture flows from the microreactor inlet to the microreactor outlet. Thereupon, the sulfonation mixture is received from the microreactor outlet. Finally, a sulfonated reaction product is precipitated out of the sulfonation mixture received from the microreactor outlet. The sulfonated reaction product is 3,4.diaminosulfonic acid, free of doubly sulfonated impurities.

HETEROCYCLIC COMPOUNDS FOR THE INHIBITION OF PASK

Disclosed herein are new heterocyclic compounds and compositions and their application as pharmaceuticals for the treatment of disease. Methods of inhibiting PAS Kinase (PASK) activity in a human or animal subject are also provided for the treatment of diseases such as diabetes mellitus.