612-82-8 Usage
Description
3,3'-Dimethylbenzidine dihydrochloride, also known as o-Tolidine dihydrochloride, is a light beige to grey-beige crystalline powder with chemical properties that make it a useful compound in various applications. It is primarily recognized as an indicator and a sensitive colorimetric reagent.
Uses
Used in Analytical Chemistry:
3,3'-Dimethylbenzidine dihydrochloride is used as an indicator in analytical chemistry for detecting the presence of specific substances. Its ability to change color in response to certain chemical reactions makes it a valuable tool for identifying and measuring the concentration of target analytes.
Used in Gold Detection:
In the field of metallurgy, 3,3'-Dimethylbenzidine dihydrochloride is used as a sensitive colorimetric reagent for detecting gold. Its color change upon interaction with gold ions allows for the accurate identification and quantification of gold in samples.
Used in Water Quality Analysis:
3,3'-Dimethylbenzidine dihydrochloride is also employed as a colorimetric reagent for determining the presence of free chlorine in water. This application is crucial for ensuring the safety and quality of water supplies, as free chlorine is often used as a disinfectant.
Air & Water Reactions
Soluble in water.
Reactivity Profile
Acidic organic/inorganic salts, such as 3,3'-Dimethylbenzidine 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 3,3'-Dimethylbenzidine dihydrochloride are not available, but 3,3'-Dimethylbenzidine dihydrochloride is probably combustible.
Safety Profile
Suspected carcinogen
with experimental carcinogenic data.
Mutation data reported. When heated to
decomposition it emits very toxic fumes of
HCl and NOx
Check Digit Verification of cas no
The CAS Registry Mumber 612-82-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,1 and 2 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 612-82:
(5*6)+(4*1)+(3*2)+(2*8)+(1*2)=58
58 % 10 = 8
So 612-82-8 is a valid CAS Registry Number.
InChI:InChI=1/C14H16N2.2ClH/c1-9-7-11(3-5-13(9)15)12-4-6-14(16)10(2)8-12;;/h3-8H,15-16H2,1-2H3;2*1H