o,o'-TOLIDINE

PRODUCT IDENTIFICATION
CAS NO. 119-93-7

o,o'-TOLIDINE
EINECS NO. 204-358-0
FORMULA C14H16N2
MOL WT. 212.29
H.S. CODE  
TOXICITY  
SYNONYMS

ortho-Tolidine; 3,3'-Dimethyl-1,1'-Biphenyl-4,4'-Diamine;
Bianisidine; 3,3'-dimethyl-4,4'-biphenyldiamine; 3,3'-Dimethylbenzidine; 4,4'-bi-o-toluidine; 3,3'-Dimethylbiphenyl-4,4'-diamine; 3,3'-tolidine; C.I. 37230; C.I. azoic diazo component 113; DMB; 4,4'-diamino-3,3'-dimethylbiphenyl; diaminoditolyl; bianisidine; dimethyl benzidine; Fast Dark Blue Base R;
SMILES

 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE off-white to gray wet powder
MELTING POINT 129 - 131 C
BOILING POINT 300 C
SPECIFIC GRAVITY  
SOLUBILITY IN WATER slightly soluble
AUTOIGNITION  
pH  
VAPOR DENSITY  
NFPA RATINGS  

REFRACTIVE INDEX

  
FLASH POINT

85 C
STABILITY Stable under ordinary conditions.

APPLICATIONS

Tolidines are used directly in making several dyes and pigments including naphthol AS-G. They are converted into numerous dye and pigment intermediates, as well as into tanning agents, curing agent for polyurethane elastomers and polymers. some tolidines are used in the detection of metals, thiocyanates, nitrites and chlorine in water.

SALES SPECIFICATION

APPEARANCE

 off-white to gray wet powder
DIAZO CONTENT

70.0% min (wet)
DIAZO CONTENT

98.0% in (dry)
INSOLUBLE IN ACID

0.5% max
TRANSPORTATION
PACKING 100kgs in drum
HAZARD CLASS 6.1 (Packing Group: III)
UN NO.

2811
OTHER INFORMATION

Hazard Symbols: XN, Risk Phrases: 22-45 Safety Phrases: 45-53-61

GENERAL DESCRIPTION OF BENZIDINE
Benzidine is the trival name for 4,4'-diaminobiphenyl which two hydrogen atoms on biphenyl molecules are replaced by amines at para position each. It is a white to slightly reddish crystalline powder turns dark on exposure to air and light; melting point of 128 C. This compound decomposes on heating and reacts violently with strong oxidants, particularly nitric acid. It is produced by the action of acids on diphenyldrazine. Benzidine can be classified as arylamine which one or more of the hydrogen atoms are replaced by aromatic groups such as homologues of aniline, p-aminobiphenyl, benzidine, and naphthylamine. Some arylamines are carcinogenic and the uses are restricted. Benzidne forms a blue precipitate with hemoglobin. Hemoglobin catalyzes the oxidation of benzidine to a polymer by hydrogen peroxide, which gives the blue color. This was the common screening test for occult blood. But the use is restricted due to cancer suspect. Benzidine is the starting material in the dye manufacturing. Numerous substituted group on the benzidine ring system as well as amine groups offer important roles to each characteristic colours directly and in preparing next target colorants. It is important in azo dyes production due to strong fix to cotton. It and its derivatives have active applications in the synthesis of dyes, pigments, paints, rubber compounding agents and wide range of organic chemicals.  Biphenyl structure of benzidine also provide the application in luminescence chemistry, spectrophotometric analysis, molecular chemistry, and as a stating material for organometallic-complexes. Benzidine molecules are used in dye production industry and certain other industrial fields. Benzidine molecules include:
Benzidine

CAS RN
2,2',5,5'-Tetrachlorobenzidine 15721-02-5
2,2'-Biphenyldiamine 1454-80-4
2,2'-Dichloro-5,5'-dimethoxybenzidine 5855-70-9
2,2'-Dichlorobenzidine 84-68-4
2,2'-Dichlorobenzidine dihydrochloride 5742-07-4
2,2'-Dichlorobenzidine sulfate 70146-07-5
2,2'-Dichloro-N,N'-bis(4-methoxybenzylidene)-4,4'-bianiline 3540-78-1
2,2'-Dimethyl(1,1'-biphenyl)-4,4'-diamine 84-67-3
2,2''-Dimethylbenzidine Hydrochloride 96196-27-9
2,2'-Dinitrobenzidine 5855-71-0
2-Aminobenzidine 2835-69-0
2-Methyl-N,N'-diacetylbenzidine 63991-70-8
2-Nitrobenzidine 2243-78-9
3,3',5,5'-Tetrachlorobenzidine 41687-08-5
3,3',5,5'-Tetrafluorobenzidine 42794-87-6
3,3',5,5'-Tetramethylbenzidine 54827-17-7
3,3',5,5'-Tetramethylbenzidine dihydrochloride hydrate 64285-73-0
3,3',5-Trichlorobenzidine 63390-12-5
3,3'-Benzidine dicarboxylic acid disodium salt 16993-94-5
3,3'-Benzidinedisulfonic acid 3365-90-0
3,3'-Diacetylbenzidine 98805-29-9
3,3'-Diaminobenzidine 91-95-2
3,3'-Diaminobenzidine tetrahydrochloride 7411-49-6
3,3'-Dibromobenzidine 34237-98-4
3,3'-Dicarbomethoxybenzidine 15403-45-9
3,3'-Dicarboxybenzidine 2130-56-5
3,3'-Dichlorobenzidine 91-94-1
3,3'-Dichlorobenzidine diethyl malonate hydrazone 103124-60-3
3,3'-Dichlorobenzidine dihydrochloride 612-83-9
3,3'-Dichlorobenzidine sulfate 64414-68-2
3,3'-Dichlorobenzidine sulphate 64969-34-2
3,3'-Dichlorobenzidine sulphate 74332-73-3
3,3'-Dichloro-N,N'-diacetylbenzidine 35958-51-1
3,3-Dichloro-N-acetylbenzidine 72732-23-1
3,3'-Difluorobenzidine 448-97-5
3,3'-Dihydroxybenzidine 2373-98-0
3,3'-Dimethoxybenzidine diethyl malonate hydrazone 103124-59-0
3,3'-Dimethoxybenzidine-4,4'-diisocyanate 91-93-0
3,3'-Dimethyl-N,N'-diacetylbenzidine 3546-11-0
3,3'-Dimethyl-N-acetylbenzidine 3546-13-2
3,3'-Dinitrobenzidine 6271-79-0
3,5-Dichlorobenzidine 63390-11-4
3,7-Dibenzothiophenediamine 5,5-dioxide 30508-11-3
3-Bromobenzidine 108238-11-5
3-Chlorobenzidine 63390-10-3
3-Fluorobenzidine 108543-17-5
3-Methoxybenzidine 3365-87-5
3-Nitrobenzidine 61841-39-2
4,4'-Diaminooctafluorobiphenyl 1038-66-0
Benzidine 92-87-5
Benzidine dihydrochloride 531-85-1
Benzidine hydrochloride 14414-68-7
Benzidine acetate 36341-27-2
Benzidine diethyl malonate hydrazone 103124-62-5
Benzidine N-glucuronide 85559-86-0
Benzidine orange 3520-72-7
Benzidine sulfate 531-86-2
Benzidine sulfone 6259-19-4
Benzidine sulphate 21136-70-9
Benzidine-2,2'-disulfonic acid 117-61-3
Benzidine-3-sulfonic acid
2051-89-0
Benzidine-4,4'-diimine 6050-16-4
Bis(diazo)benzidine 5957-03-9
C.I. Direct Black 38 1937-37-7
C.I. Direct Blue 6 2602-46-2
C.I. Direct brown 95 16071-86-6
C.I. Pigment Red 38 6358-87-8
C.I. Pigment yellow 12 6358-85-6
C.I. Pigment Yellow 13 5102-83-0
C.I. Pigment Yellow 14 5468-75-7
Diacetylacetotolidide 91-96-3
Diazobenzidine 3019-12-3
Dicarboxidine dihydrochloride 56455-90-4
Dicarboxydine 73758-56-2
Dichlorobenzidine 1331-47-1
Dimethoxybenzidine 1331-53-9
N-(3-Sulfopropyl)-3,3',5,5'-tetramethylbenzidine sodium salt 102062-36-2
N-(Deoxyguanosin-8-yl)benzidine 82682-91-5
N,N,N',N'-Tetraethylbenzidine 6860-63-5
N,N,N',N'-Tetrakis(4-aminophenyl)benzidine
3547-23-7
N,N,N',N'-Tetramethylbenzidine 366-29-0
N,N'-Diacetylbenzidine 613-35-4
N,N'-Dibenzylidene-2,2'-dichloro-4,4'-bianiline 10147-75-8
N,N'-Dimethylbenzidine 2810-74-4
N,N'-Dimethylbenzidine 2810-74-4
N,N'-Diphenylbenzidine 531-91-9
N,N'-Diphenylbenzidine 531-91-9
N-Acetylbenzidine 3366-61-8
N-Acetyldianisidine 83690-97-5
N-Hydroxy-N,N'-diacetylbenzidine 71609-22-8
N-Hydroxy-N'-acetylbenzidine 71609-23-9
N-Vanillylidenebenzidine 73688-67-2
o-Dianisidine 119-90-4
o-Dianisidine dihydrochloride 20325-40-0
o-Dianisidine hydrochloride 111984-09-9
o-Tolidine 119-93-7
o-Tolidine dihydrofluoride 41766-75-0
o-Tolidine dihydrochloride 612-82-8
o-Tolidine hydrochloride 7563-59-9
Tetramethylbenzidine bis-chloro-p-nitrobenzylate 24660-78-4
Tetramethylbenzidine bis-ethiodide 24660-74-0
Tetramethylbenzidine bis-iodobenzylate 24660-76-2
Tetramethylbenzidine bis-methylmethosulfate 24702-66-7
Tetramethylbenzidine 34314-06-2
Tetraphenylbenzidine 15546-43-7