Description Uses
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O-Tolidine

Description Uses
Product Name
O-Tolidine
CAS No.
119-93-7
Chemical Name
O-Tolidine
Synonyms
DMB;Tolidine;2-Tolidin;o-Tolidin;2-Tolidine;2-Tolidina;O-TOLIDINE;C.I. 37230;ο-Tolidine;bianisidine
CBNumber
CB7852914
Molecular Formula
C14H16N2
Formula Weight
212.29
MOL File
119-93-7.mol
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O-Tolidine Property

Melting point:
128-131 °C(lit.)
Boiling point:
300.5 °C
Density 
0.9678 (rough estimate)
refractive index 
n20/D 1.341
Flash point:
244 °C
storage temp. 
?20°C
solubility 
2% HCl: 10 mg/mL, clear
pka
4.59±0.10(Predicted)
form 
powder (may contain lumps)
Colour Index 
37230
color 
light brown
Water Solubility 
Slightly soluble in water.
Merck 
14,9514
BRN 
2210640
Exposure limits
TLV-TWA none; carcinogenicity: A2 — Suspected Human Carcinogen (ACGIH), Animal Limited Evidence (IARC).
InChIKey
NUIURNJTPRWVAP-UHFFFAOYSA-N
NIST Chemistry Reference
[1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethyl-(119-93-7)
IARC
2B (Vol. 1, Sup 7) 1987
EPA Substance Registry System
3,3'-Dimethylbenzidine (119-93-7)
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Safety

Hazard Codes 
T,N,F
Risk Statements 
45-68-51/53-22-11
Safety Statements 
53-45-61-16
RIDADR 
UN 3082 9/PG 3
WGK Germany 
3
RTECS 
DD1225000
8
TSCA 
Yes
HazardClass 
6.1(b)
PackingGroup 
III
HS Code 
29215900
Hazardous Substances Data
119-93-7(Hazardous Substances Data)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H302Harmful if swallowed

H350May cause cancer

H401Toxic to aquatic life

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P201Obtain special instructions before use.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P308+P313IF exposed or concerned: Get medical advice/attention.

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
31659
Product name
o-Tolidine
Purity
analytical standard
Packaging
100mg
Price
$48.4
Updated
2021/03/22
Sigma-Aldrich
Product number
T8533
Product name
o-Tolidine
Purity
≥97%, powder
Packaging
25g
Price
$75.9
Updated
2021/03/22
TCI Chemical
Product number
T0253
Product name
o-Tolidine
Purity
>98.0%(GC)
Packaging
25g
Price
$39
Updated
2021/03/22
TCI Chemical
Product number
T0253
Product name
o-Tolidine
Purity
>98.0%(GC)
Packaging
250g
Price
$195
Updated
2021/03/22
Alfa Aesar
Product number
A17837
Product name
o-Tolidine, 98%
Packaging
100g
Price
$200
Updated
2021/03/22
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O-Tolidine Chemical Properties,Usage,Production

Description

2-Tolidine (orthotolidine, o-tolidine; not to be confused with o-toluidine) is an organic compound with the chemical formula (C6H4(CH3)NH2)2. Several isomers are known; the 3-tolidine derivative is also important commercially. It is a colorless compound although commercial samples are often colored. It is slightly soluble in water. It forms salts with acids, such as the hydrochloride, which is commercially available. 2-Tolidine can be produced by a benzidine rearrangement from a hydrazine derivative derived from 2-nitrotoluene.

Uses

2-Tolidine is a commercial aromatic amine used mainly for dye production. 2-Tolidine is an intermediate for the production of soluble azo dyes and insoluble pigments used particularly in the textile, leather and paper industries. 2-Tolidine was widely used as a reagent or indicator in analytical, clinical and forensic chemistry, such as in the analytical determination of gold, or determination of the chlorine level in swimming pool water.

Chemical Properties

LIGHT GREY-GREEN TO GREY POWDER

Chemical Properties

o-Tolidine is a white to reddish crystal or powder. Darkens on exposure to air. Often used in paste or wet cake form. Used as a basis for many dyes.

Uses

o-Tolidine is used extensively in the manufacture of dyes. It is also used as a reagentfor the analysis of gold and free chlorine inwater.

Uses

Sensitive colorimetric reagent for gold and for free chlorine in water.

Uses

3,3'-Dimethylbenzidine be used for preparation polyimide and epoxy resin material.

General Description

White to reddish crystals or crystalline powder or a light tan powder.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

C.I. 37230 is sensitive to exposure to light. May be sensitive to prolonged exposure to air. A weak base that forms salts with hydrochloric acid or sulfuric acid. C.I. 37230 can be acetylated. Incompatible with strong agents .

Hazard

Eye, bladder and kidney irritant, bladder cancer, and methemoglobinemia. Possible carcinogen.

Health Hazard

The information on toxicity and carcinogenicity of o-tolidine is very little. o-Tolidineoften contains other biphenylamine contaminants. Its structure and chemical propertiesare similar to those of benzidine. The toxicproperties are therefore expected to be similar to those of benzidine.
o-Tolidine is absorbed into body throughthe skin, respiratory, and gastrointestinaltract. The acute oral and dermal toxicity wasmoderate in experimental animals. An oralLD50 value in rats is within the range of400 mg/kg.
o-Tolidine produced bladder cancer in testspecies. Also, cancers in other tissues werenoted in some animals. ACGIH lists thissubstance as a suspected human carcinogen.

Fire Hazard

Flash point data for C.I. 37230 are not available; however, C.I. 37230 is probably combustible.

Safety Profile

Confirmed carcinogen with experimental carcinogenic and tumorigenic data. Poison by intraperitoneal route. Moderately toxic by ingestion. Human mutation data reported. When heated to decomposition it emits toxic fumes of NOx.

Potential Exposure

Over 75% of o-tolidine is used as a dye and as an intermediate in the production of rubber products, dyestuffs, pigments and pesticides. Approximately 20% of o-tolidine is used in the production of polyurethane-based high-strength elastomers, coatings, and rigid plastics. o-Tolidine has also been used in small quantities in chlorine test kits by water companies and swimming pool owners. Used as a laboratory agent to detect blood.

Carcinogenicity

3,3′-Dimethylbenzidine is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals.

Shipping

UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required. UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required.

Purification Methods

Dissolve the tolidine in *benzene by percolation through a column of activated alumina and crystallise it from *benzene/pet ether. [Beilstein 13 IV 410.]

Incompatibilities

Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, strong reducing agents.

Waste Disposal

Dissolve in flammable solvent and spray into firebox of an incinera tor equipped with afterburner and scrubber. Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal.

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O-Tolidine Suppliers

TianJin Alta Scientific Co., Ltd.
Tel
+86-022-6537-8550
Fax
+86-022-2532-9655
Email
contact@altascientific.com
Country
China
ProdList
2775
Advantage
58
Changsha Changtang Import and Export Co., LTD
Tel
189-74813109-
Fax
0731-84372366
Email
lilyqu@chemoway.com
Country
China
ProdList
984
Advantage
58
J & K SCIENTIFIC LTD.
Tel
010-82848833- ;010-82848833-
Fax
86-10-82849933
Email
jkinfo@jkchemical.com;market6@jkchemical.com
Country
China
ProdList
96815
Advantage
76
Changzhou Sunlight Pharmaceutical Co., Ltd
Tel
0519-83131668;0519-83137042
Fax
+86-519-83138041
Email
info@sunlightchem.com;info@sunlightchem.com
Country
China
ProdList
90
Advantage
69
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
21-61259100-
Fax
86-21-61259102
Email
sh@meryer.com
Country
China
ProdList
40265
Advantage
62
Alfa Aesar
Tel
400-610-6006; 021-67582000
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30160
Advantage
84
TCI (Shanghai) Development Co., Ltd.
Tel
021-67121386 / 800-988-0390
Fax
021-67121385
Email
Sales-CN@TCIchemicals.com
Country
China
ProdList
24555
Advantage
81
Energy Chemical
Tel
021-58432009-
Fax
021-58436166
Email
sales8178@energy-chemical.com
Country
China
ProdList
44043
Advantage
61
Beijing Ouhe Technology Co., Ltd
Tel
010-82967028-
Fax
+86-10-82967029
Email
2355560935@qq.com
Country
China
ProdList
12282
Advantage
60
Junkai (Tianjin) Chemical Co., Ltd
Tel
-13944661236
Fax
+86-22-23787875
Email
sales@junkaichem.com
Country
China
ProdList
44
Advantage
66
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View Lastest Price from O-Tolidine manufacturers

Cangzhou Wanyou New Material Technology Co.,Ltd
Product
3,3'-Tolidine 119-93-7
Price
US $1.00/g
Min. Order
1g
Purity
99%
Supply Ability
20kg
Release date
2019-08-02
career henan chemical co
Product
3,3'-Dimethyl-[1,1'-biphenyl]-4,4'-Diamine(O-Tolidine);1’-biphenyl)-4,4’-diamine,3,3’-dimethyl-( 119-93-7
Price
US $1.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
100KG
Release date
2018-12-18
career henan chemical co
Product
C.I. 37230 119-93-7
Price
US $7.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
100kg
Release date
2018-12-18

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