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o-Dianisidine

Product Name
o-Dianisidine
CAS No.
119-90-4
Chemical Name
o-Dianisidine
Synonyms
ai3-00864;c.i.24110;bluebasenb;bluebnbase;C.I. 24110;Dianisidine;cellitazolb;FAST BLUE B;Blue Base NB;Blue BN Base
CBNumber
CB7385595
Molecular Formula
C14H16N2O2
Formula Weight
244.29
MOL File
119-90-4.mol
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o-Dianisidine Property

Melting point:
137-138 °C(lit.)
Boiling point:
387.21°C (rough estimate)
Density 
1.1079 (rough estimate)
refractive index 
1.6000 (estimate)
Flash point:
403 °F
storage temp. 
Store at RT.
solubility 
H2O: slightly soluble
Colour Index 
37235
pka
4.71±0.10(Predicted)
form 
Crystalline Powder
color 
Pink to beige-brown
Water Solubility 
Soluble in alcohol, benzene, ether, chloroform, acetone, most organic solvents and lipids. Slightly soluble in water.
Merck 
14,2991
BRN 
1879884
CAS DataBase Reference
119-90-4(CAS DataBase Reference)
NIST Chemistry Reference
Benzidine, 3,3'-dimethoxy-(119-90-4)
IARC
2B (Vol. 4, Sup 7) 1987
EPA Substance Registry System
3,3'-Dimethoxybenzidine (119-90-4)
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Safety

Hazard Codes 
T
Risk Statements 
45-22
Safety Statements 
53-45
RIDADR 
2811
WGK Germany 
3
RTECS 
DD0875000
TSCA 
Yes
HazardClass 
6.1(a)
PackingGroup 
II
HS Code 
29222990
Hazardous Substances Data
119-90-4(Hazardous Substances Data)
Toxicity
Dianisidine is a probable carcinogen used in the manufacture of dyes. EPA has classified as a Group 2B—probable human carcinogen.
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H302Harmful if swallowed

H350May cause cancer

Precautionary statements

P201Obtain special instructions before use.

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

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
33430
Product name
o-Dianisidine
Purity
for spectrophotometric det. of Au, NO2-, Ce(IV), for the detection of Au, Co, Cu, SCN-, V, ≥97.0%
Packaging
10g
Price
$126
Updated
2024/03/01
Sigma-Aldrich
Product number
33430
Product name
o-Dianisidine
Purity
for spectrophotometric det. of Au, NO2-, Ce(IV), for the detection of Au, Co, Cu, SCN-, V, ≥97.0%
Packaging
50g
Price
$195
Updated
2022/05/15
TCI Chemical
Product number
D1344
Product name
o-Dianisidine
Purity
>98.0%(HPLC)
Packaging
25g
Price
$51
Updated
2024/03/01
TCI Chemical
Product number
D1344
Product name
o-Dianisidine
Purity
>98.0%(HPLC)
Packaging
100g
Price
$135
Updated
2024/03/01
Alfa Aesar
Product number
A17150
Product name
o-Dianisidine, 98+%
Packaging
5g
Price
$33.7
Updated
2024/03/01
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o-Dianisidine Chemical Properties,Usage,Production

Description

DMOB is a colorless crystalline materialwhich may turn purple on standing in air. Molecularweight=244.32; Freezing/Melting point=137-138℃;Flash point=206℃. Hazard Identification (based onNFPA-704 M Rating System): Health 2, Flammability 1,Reactivity 0. Slightly soluble in water.

Chemical Properties

o-Dianisidine, crystallizes dimorphically, rarely in needles, with mp 133°C , often in flakes with mp 137-138°C . It forms colorless crystals, but commercial products have a tinge of violet. It is sparingly soluble in water but soluble in alcohol, ether, and benzene. One gram of ethyl acetate dissolves 0.285 g of o-dianisidine at 73°C .

The pure compound is stable upon exposure to air, but commercial products turn violet. o-Dianisidine is resistant to water but sensitive to oxidizing agents.

Uses

o-Dianisidine is a starting material for the production of disazo dyes and pigments.
Like benzidine and o-tolidine, o-dianisidine forms colors with numerous oxidizing agents, e.g., copper, cobalt, and gold ions. o-Dianisidine is quantitatively determined by titration with nitrite using potassium iodide and starch paper as the indicator. o-Dianisidine can be detected in the urine using potassium 1,2-naphthoquinone4-sulfonate after extraction. A rapid and easy method is based on the color formed with cyanogen bromide. Its detection limit is 0.05 mg/kg.
The free o-dianisidine base and the dihydrochloride are marketed in moist forms with a 10-30% water content.

Uses

o-Dianisidine is used as a redox indicator. It is used as an intermediate for the preparation of azo dyes, pigments and o-dianisidine diisocyanate, which finds application in adhesives, polyurethane elastomers and resins. It is also used in various industries like leather, paper, plastics, rubber, and textiles. It acts as a reagent to detect metals, thiocyanates, and nitrites.

Uses

o-Dianisidine is used almost exclusively as a chemical intermediate for producing dyes and pigments. In 1971, the Society of Dyers and Colourists reported its use in the production of 89 dyes (see Dyes Metabolized to o-Dianisidine, below). o-Dianisidine is also used as a chemical intermediate to produce o-dianisidine diisocyanate for use in adhesives and as a component of polyurethanes. Other uses are as a dye for paper, plastics, rubber, and textiles and as a test substance for detection of metals, thiocyanates, and nitrites (IARC 1974, HSDB 2009).

Preparation

2-Nitroanisole is reduced (H2-catalyst or iron-formic acid) to o-anisidine or (benzidine-type reaction) to o-dianisidine [119-90-4], both of which are important as dye intermediates.

Definition

ChEBI: 3,3'-Dimethoxybenzidine is a member of biphenyls.

Synthesis Reference(s)

Journal of the American Chemical Society, 106, p. 7077, 1984 DOI: 10.1021/ja00335a035

General Description

Colorless crystals or a light brown powder. Turns violet on standing. Carcinogen.

Air & Water Reactions

Finely powdered material is a significant dust explosion hazard. Insoluble in water.

Reactivity Profile

o-Dianisidine is a weak base. Reacts exothermically with acids. Sensitive to heat, air and prolonged exposure to light.

Fire Hazard

o-Dianisidine is combustible.

Safety Profile

Confirmed carcinogen with experimental tumorigenic data. Moderately toxic by ingestion. Mutation data reported. Combustible when exposed to heat or flame. When heated to decomposition it emits toxic fumes of NOx.

Toxicology

In the presence of rat liver homogenate, o- dianisidine is positive in the Ames test. It is capable of inducing unscheduled DNA synthesis inHeLa cells and in primary rat hepatocytes, and it provokes cell transformation in baby hamster kidney cells in vitro. o-Dianisidine is carcinogenic in rats. An oral dose of 30 mg administered three times per week for 13 months produced tumors in the zymbal glands and in other tissues. No conclusive epidemiological studies have been reported on the carcinogenicity of o-diani- sidine in humans. No MAK value has been established. o-Dianisidine is classified in group III B.

Potential Exposure

Tumorigen,Mutagen; Human Data. DMOB or its dihydrochloride isused principally as a chemical intermediate for the production of azo dyes. About 30% of DMOB is used as a chemical intermediate in the production of o-dianisidinediisocyanate (3,30-dimethoxy-4,40-diisocyanate-biphenyl)that is used in adhesive systems and also as a component ofpolyurethane elastomers and resins. DMOB is used as a dyeitself for leather, paper, plastics, rubber, and textiles.DMOB has also been used in the detection of metals, thiocyanates, and nitrites.

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seekmedical attention immediately. If this chemical contactsthe skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove fromexposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing hasstopped and CPR if heart action has stopped. Transferpromptly to a medical facility. When this chemical hasbeen swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.

Carcinogenicity

o-Dianisidine is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals.

storage

Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. 3,30-Dimethoxybenzidine mayreact with oxidizers (such as perchlorates, peroxides, permanganates, chlorates, and nitrates). Store in tightly closedcontainers in a cool, well-ventilated area. Avoid exposureto light. A regulated, marked area should be establishedwhere this chemical is handled, used, or stored in compliance with OSHA Standard 1910.1045.

Shipping

Dyes, liquid, toxic, n.o.s or Dye intermediates,liquid, toxic, n.o.s. require a label of “POISONOUS/TOXICMATERIALS.” They fall in Hazard Class 6.1 and 3,30-dimethoxybenzidine in Packing Group II.

Properties and Applications

red light navy blue light to dark. And C.I.Azoic Diazo Component 48 the same chemical structure.

Standard(Polyamide) Ironing Fastness Light Fastness Persperation Fastness Washing Fastness
Fading Stain Fading Stain Fading Stain
AATCC 2 5 5 5 5

Incompatibilities

Oxidizers.

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View Lastest Price from o-Dianisidine manufacturers

Shanghai UCHEM Inc.
Product
o-Dimethoxybenzidine 119-90-4
Price
US $13.00-95.00/g
Min. Order
5g
Purity
0.98
Supply Ability
100kg
Release date
2023-11-28
Shaanxi Dideu Medichem Co. Ltd
Product
o-Dianisidine 119-90-4
Price
US $0.10/KG
Min. Order
1KG
Purity
99.0%
Supply Ability
1000 tons
Release date
2019-12-30
Career Henan Chemical Co
Product
o-Dianisidine 119-90-4
Price
US $1.00/KG
Min. Order
1KG
Purity
95-99%
Supply Ability
1ton
Release date
2019-12-30

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