531-85-1 Usage
Uses
The dihydrochlorie salt of Benzidine (B121000) a common used in dyes and environmental testing.
General Description
White crystalline powder.
Air & Water Reactions
Benzidine dihydrochloride may be sensitive to prolonged exposure to light and air. Slightly soluble in water.
Reactivity Profile
Acidic organic/inorganic salts, such as Benzidine dihydrochloride, are generally soluble in water. The resulting solutions contain moderate to high concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions.
Fire Hazard
Flash point data for Benzidine dihydrochloride are not available; however, Benzidine dihydrochloride is probably combustible.
Safety Profile
Suspected carcinogen
with experimental carcinogenic and
tumorigenic data. Human mutation data
reported. When heated to decomposition it
emits very toxic fumes of HCl and NOx.
Purification Methods
Benzidine dihydrochloride [531-85-1] M 257.2, m >250o(dec). Crystallise the salt by dissolving in hot H2O, and adding conc HCl to the slightly cooled solution. CARCINOGENIC.[Beilstein 13 IV 365.]
Check Digit Verification of cas no
The CAS Registry Mumber 531-85-1 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,3 and 1 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 531-85:
(5*5)+(4*3)+(3*1)+(2*8)+(1*5)=61
61 % 10 = 1
So 531-85-1 is a valid CAS Registry Number.
InChI:InChI=1/C12H12N2.ClH/c13-11-5-1-9(2-6-11)10-3-7-12(14)8-4-10;/h1-8H,13-14H2;1H
531-85-1Relevant articles and documents
Exclusion complexes of the HCl salts of benzidine and bis(4-aminophenyl) methane with two methyl-substituted cucurbiturils
Yan, Ying,Xue, Sai-Feng,Cong, Hang,Zhang, Jian-Xing,Zhang, Yun-Qian,Zhu, Qian-Jiang,Tao, Zhu
experimental part, p. 2136 - 2143 (2009/12/25)
The interaction between two partially methyl-substituted cucurbiturils, a sym-tetramethyl-substituted cucurbit[6]uril (TMeQ[6]) and a meta-hexamethyl- substituted cucurbituril (m-HMeQ[6]), with the hydrochloride salt of benzidine (g1·HCl) and the analogue