o-Dianisidine | 119-90-4

o-Dianisidine Properties

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
pka	4.71±0.10(Predicted)
Colour Index	37235
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)
EWG's Food Scores	5
FDA UNII	MJY508JZXV
Proposition 65 List	3,3'-Dimethoxybenzidine (o-Dianisidine)
IARC	2B (Vol. 4, Sup 7) 1987
NIST Chemistry Reference	Benzidine, 3,3'-dimethoxy-(119-90-4)
EPA Substance Registry System	3,3'-Dimethoxybenzidine (119-90-4)

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07,GHS08

Signal word

Danger

Hazard statements

H302-H350

Precautionary statements

P201-P301+P312+P330-P308+P313

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

Toxicity

Dianisidine is a probable carcinogen used in the manufacture of dyes. EPA has classified as a Group 2B—probable human carcinogen.

NFPA 704

	1
1		0

o-Dianisidine price More Price(34)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	33430	o-Dianisidine for spectrophotometric det. of Au, NO2-, Ce(IV), for the detection of Au, Co, Cu, SCN-, V, ≥97.0%	119-90-4	10g	$126	2024-03-01	Buy
Sigma-Aldrich	33430	o-Dianisidine for spectrophotometric det. of Au, NO2-, Ce(IV), for the detection of Au, Co, Cu, SCN-, V, ≥97.0%	119-90-4	50g	$195	2022-05-15	Buy
TCI Chemical	D1344	o-Dianisidine >98.0%(HPLC)	119-90-4	25g	$51	2024-03-01	Buy
TCI Chemical	D1344	o-Dianisidine >98.0%(HPLC)	119-90-4	100g	$135	2024-03-01	Buy
Alfa Aesar	A17150	o-Dianisidine, 98+%	119-90-4	5g	$33.7	2024-03-01	Buy

Product number	Packaging	Price	Buy
33430	10g	$126	Buy
33430	50g	$195	Buy
D1344	25g	$51	Buy
D1344	100g	$135	Buy
A17150	5g	$33.7	Buy

o-Dianisidine Chemical Properties,Uses,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
Standard(Polyamide)	Fading	Stain	Light Fastness	Fading	Stain	Fading	Stain
AATCC			2	5	5	5	5

Incompatibilities

Oxidizers.

o-Dianisidine Preparation Products And Raw materials

Raw materials

2-Nitroanisole o-Dianisidine

Preparation Products

CHICAGO SKY BLUE 6B Direct Blue 151 3,3'-Dihydroxybenzidine disodium 3-[[4'-[[6-amino-1-hydroxy-3-sulphonato-2-naphthyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-1-sulphonate 3,3'-dihydroxy-[1,1'-biphenyl]-4,4'-dicarboxylic acid

BENZOAZURINE 1-Naphthalenesulfonic acid, 4-amino-5-hydroxy-6-[[4'-[(4-hydroxyphenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-, monosodium salt 1,6-Naphthalenedisulfonic acid, 7-[[4'-[(6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-8-hydroxy-, trisodium salt tetrasodium [mu-[[3,3'-[(3,3'-dihydroxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4,5-dihydroxynaphthalene-2,7-disulphonato]](8-)]]dicuprate(4-) C.I. Direct Black 87

CHICAGO SKY BLUE 6B DIRECTVIOLET32 2,7-Naphthalenedisulfonic acid, 3,3'-[(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[5-chloro-4-hydroxy-, tetrasodium salt 1-Naphthalenesulfonic acid, 3-[[4'-[(2,4-diamino-5-methylphenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4,6-dihydroxy-, monosodium salt 2-Naphthalenesulfonic acid, 6-amino-3-[[4'-[(4-amino-6-sulfo-1-naphthalenyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-hydroxy-, disodium salt

DIRECT BLACK 91 Direct Blue 151 DIRECT BLUE 98 Direct blue 215 (C.I. 24415) DIRECT BLUE 80

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o-Dianisidine Suppliers

Global( 258)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Shanghai UCHEM Inc.	+862156762820 +86-13564624040	sales@myuchem.com	China	6710	58
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21691	55
Jilin Chinese Academy of Sciences - Yanshen Technology Co., Ltd.	0431-80514535 13634302652	Extension@chemextension.com	CHINA	967	58
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28180	58
Hubei xin bonus chemical co. LTD	86-13657291602	linda@hubeijusheng.com	CHINA	22968	58
CONIER CHEM AND PHARMA LIMITED	+8618523575427	sales@conier.com	China	47465	58
career henan chemical co	+86-0371-86658258 15093356674;	factory@coreychem.com	China	29826	58
Shanghai Daeyeon Chemicals Co., Ltd	021-64478606 +8615900664856	daeyeon001@vip.163.com	China	2062	58
Hefei TNJ Chemical Industry Co.,Ltd.	0551-65418671	sales@tnjchem.com	China	34572	58
Dideu Industries Group Limited	+86-29-89586680 +86-15129568250	1026@dideu.com	China	29271	58

Supplier	Advantage
Shanghai UCHEM Inc.	58
Henan Tianfu Chemical Co.,Ltd.	55
Jilin Chinese Academy of Sciences - Yanshen Technology Co., Ltd.	58
Hubei Jusheng Technology Co.,Ltd.	58
Hubei xin bonus chemical co. LTD	58
CONIER CHEM AND PHARMA LIMITED	58
career henan chemical co	58
Shanghai Daeyeon Chemicals Co., Ltd	58
Hefei TNJ Chemical Industry Co.,Ltd.	58
Dideu Industries Group Limited	58

View Lastest Price from o-Dianisidine manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2024-02-23	o-Dimethoxybenzidine 119-90-4	US $13.00-95.00 / g	5g	0.98	100kg	Shanghai UCHEM Inc.
2022-07-26	o-Dianisidine 119-90-4	US $1.10 / g	1g	99.00%	100 Tons Min	Dideu Industries Group Limited
2019-12-31	o-Dianisidine 119-90-4	US $1.00 / KG	1KG	95-99%	1ton	Career Henan Chemical Co

o-Dimethoxybenzidine
119-90-4
US $13.00-95.00 / g
0.98
Shanghai UCHEM Inc.

o-Dianisidine
119-90-4
US $1.10 / g
99.00%
Dideu Industries Group Limited

o-Dianisidine
119-90-4
US $1.00 / KG
95-99%
Career Henan Chemical Co

o-Dianisidine Spectrum

o-Dianisidine(119-90-4)MS o-Dianisidine(119-90-4)¹HNMR o-Dianisidine(119-90-4)¹³CNMR o-Dianisidine(119-90-4)IR1 o-Dianisidine(119-90-4)IR2 o-Dianisidine(119-90-4)Raman

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o-Dianisidine,3,3′-Dimethoxybenzidine, Fast BlueB 3.3'-Dimethoxybenzidine 1g [119-90-4] 4,4'-Diamino-3,3'-dimethoxybiphenyl 3,3'-Dimethoxybenzidine Fast Blue B 3.3'-DiMethoxy 3,3'-Dimethoxybenzidine Solution, 100ppm [1,1'-Biphenyl]-4,4'-diamine, 3,3'-dimethoxy- 1’-biphenyl)-4,4’-diamine,3,3’-dimethoxy-( 1’-Biphenyl)-4,4’-diamine,3,3’-dimethoxy-(1 1’-biphenyl]-4,4’-diamine,3,3’-dimethoxy-[ 3,3’-dianisidine 3,3’-dimethoxy-4,4’-diaminobiphenyl 3,3’-dimethoxy-benziden 3,3’-dimethoxybenzidin 3,3’-dimethoxy-benzidin 3,3’-dimethoxybenzidin(czech) 3,3’-dimethoxybiphenyl-4,4’-diamine 3,3’-dimetossibenzodina 3, 3'-Dimethoxybenzidine, pract., 97% 3,3'-Dianisidine 3,3'-Dimethoxy[1,1'-biphenyl]-4,4'-diamine 3,3'-Dimethoxy-4,4'-diaminodiphenyl 3,3'-Dimethoxybenzidin 3,3'-Dimetossibenzodina 4,4’-diamino-3,3’-dimethoxydiphenyl 4,4'-Bi-o-anisidine 4,4'-Diamino-3,3'-dimethoxydiphenyl Acetamine Diazo Black RD Acetamine diazo navy rd acetaminediazoblackrd acetaminediazonavyrd ai3-00864 Amacel Developed Navy SD amaceldevelopednavysd Azoene Fast Blue Base Azoene Fast Blue Salt azoenefastbluebase Azofix Blue B Salt Azogene Fast Blue B Azogene Fast Blue B Salt azogenefastblueb biphenyl,4,4’diamino-3,3’dimethoxy Blue Base Irga B Blue Base NB Blue BN Base Blue BN Salt Blue Salt NB bluebaseirgab bluebasenb bluebnbase Brentamine Fast Blue B Base brentaminefastbluebbase C.I. 24110 Diacelliton fast grey G diacellitonfastgreyg diacelnavydc Dianisidine Diato Blue Base B Diato Blue Salt B