CompoundList
Sign in
Disperse dyes

Dianisidine

Also known as o-Dianisidine, 3,3'-Dimethoxybenzidine, Blue Base NB

CAS 119-90-4Formula C14H16N2O2Molar mass 244.29 g/molEC 204-355-4
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard 29 suppliers listed
Get quotes Compare 29 suppliers
Dianisidine chemical structure, C14H16N2O2, CAS 119-90-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Leaflets or needles from water
Melting point
137 °C
Flash point
206 °C
Solubility
In water, 60 mg/l @ 25 °C
HS code
320411
Category
Disperse dyes
UN number
UN 2811
Illustrative photo, closed jumbo bulk bags in a warehouse in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Dianisidine?

Plain description, key identifiers and synonyms

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

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-(4-amino-3-methoxyphenyl)-2-methoxyaniline
CAS number
119-90-4 CAS number cross-checked
EC number
204-355-4
Molecular formula
C14H16N2O2
UNII
MJY508JZXV
MDL number
MFCD00008372
InChIKey
JRBJSXQPQWSCCF-UHFFFAOYSA-N
InChI
InChI=1S/C14H16N2O2/c1-17-13-7-9(3-5-11(13)15)10-4-6-12(16)14(8-10)18-2/h3-8H,15-16H2,1-2H3
SMILES (canonical and isomeric)
COC1=C(C=CC(=C1)C2=CC(=C(C=C2)N)OC)N

Synonyms

  • o-Dianisidine
  • 3,3'-Dimethoxybenzidine
  • Blue Base NB
  • Fast Blue B Base
  • Cellitazol B
  • Mitsui Blue B Base
  • ortho-Dianisidine
  • Azogene Fast Blue B
  • Diacel Navy DC
  • Neutrosel navy bn
  • Disperse Black 6
  • Blue BN Base
  • Blue Base irga B
  • Spectrolene Blue B
  • Fast Blue Base B
  • Lake Blue B Base
  • o-Dianisidina
  • Diato Blue Base B
  • Diazo Fast Blue B
  • o-Dianisidin
  • Azofix Blue B Salt
  • Kayaku Blue B Base
  • Fast Blue DSC Base
  • Setacyl Diazo Navy R
  • Azoene Fast Blue Base
Show all 39 synonyms
  • Hiltonil Fast Blue B Base
  • Diacelliton fast grey G
  • Naphthanil Blue B Base
  • 4,4'-Bi-o-anisidine
  • Acetamine Diazo Navy RD
  • 3,3'-Dianisidine
  • 3,3'-Dimethoxybiphenyl-4,4'-diamine
  • 4,4'-Diamino-3,3'-dimethoxybiphenyl
  • Acetamine Diazo Black RD
  • Amacel Developed Navy SD
  • Azogene Fast Blue B Salt
  • Meisei Teryl Diazo Blue HR
  • Brentamine Fast Blue B Base
  • 3,3'-Dimethoxy-[1,1'-biphenyl]-4,4'-diamine

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Leaflets or needles from waterexp.
Melting point
137 °Cexp.
Flash point
206 °Cexp.
Solubility
In water, 60 mg/l @ 25 °Cexp.
Vapour pressure
Negligibleexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
244.29 g/molcalc.
Exact mass
244.1212 Dacalc.
LogP (octanol/water)
2.54calc.
Topological polar surface area
70.5 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
3calc.
Heavy atoms
18calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.14calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc(-c2ccccc2)cc1

c1ccc(-c2ccccc2)cc1

2 rings, 12 atoms, the Biphenyl ring system.

32,228 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard
100NFPA 704 rating

Hazard statements

  • H302Harmful if swallowed.
  • H350May cause cancer.
Precautionary statements (9)
  • P203Obtain, read and follow all safety instructions before use.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P318If exposed or concerned, get medical advice.
  • P330Rinse mouth.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2811
Transport hazard class
6.1
Packing group
III

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Dianisidine suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 29 suppliers
29 of 29 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

29 suppliers in 7 countries

Send one request to many suppliers

Choose up to 10 suppliers or let us match your request. Compare quotes side by side, free.

Choose suppliersPost a request

Dianisidine price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

Uses and applications

What the substance is used for, by industry and function

Chemical intermediate in prodn of o-dianisidine diisocyanate ..., for detection of presence of thiocyanates, nitrites & a number of metals.

Used in dyeing leather, paper, plastic, rubber, textiles.

Chemical intermediate for pigments, eg, pigment orange 16, dye for acetate rayon (former use).

Azo dye intermediate.

Chemical intermediate in the production of azo dyes.

Industries and functions

Functional uses

  • Dye
  • Pigment

Pharmacology

Dianisidine is a colorless, highly toxic, crystalline compound that turns violet when exposed to air. Dianisidine is used exclusively as an intermediate for the production of dyes and pigments. Exposure to this substance causes skin irritation and sensitization. Dianisidine is reasonably anticipated to be a human carcinogen based on evidence of carcinogenicity in experimental animals. (NCI05)

How it is made

The methyl ether of o-nitrophenol is reduced by zinc dust and caustic soda to the hydrazo cmpd which is then rearranged with hydrochloric acid.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 612-036-00-X

Health and food

  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: 3,3'-Dimethoxybenzidine (ortho-Dianisidine) and its salts, Ref no: 709, Annex ref: II/709

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Dianisidine is traded under.

HS 3204.11Indicative HS code

Disperse dyes and preparations based thereon

World exports in 2024
$854M
−0.9% vs 2023, imports $829M
2019 to 2024
Top exporters
  1. China51.5%
  2. India * partner reported6.6%
  3. Germany6.4%
Top importers
  1. Indonesia13.0%
  2. Vietnam * partner reported7.5%
  3. Turkey7.5%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Dianisidine is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Dianisidine, based on the data on this page

What is Dianisidine?

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

What is the CAS number of Dianisidine?

The CAS registry number of Dianisidine is 119-90-4.

What is the molecular formula and weight of Dianisidine?

The molecular formula of Dianisidine is C14H16N2O2 and its molar mass is 244.29 g/mol.

What is Dianisidine used for?

Chemical intermediate in prodn of o-dianisidine diisocyanate ..., for detection of presence of thiocyanates, nitrites & a number of metals. Used in dyeing leather, paper, plastic, rubber, textiles. Chemical intermediate for pigments, eg, pigment orange 16, dye for acetate rayon (former use). Azo dye intermediate.

Is Dianisidine hazardous?

Dianisidine carries the GHS signal word "Danger". Main hazards: harmful if swallowed, may cause cancer. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Dianisidine?

Dianisidine is usually classified under HS code 320411 (Disperse dyes and preparations based thereon). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Dianisidine?

CompoundList lists 29 suppliers of Dianisidine in India, China, United States, Switzerland and 3 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Dianisidine in India?

12 suppliers in India list Dianisidine on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Dianisidine?

Suppliers quote Dianisidine on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Dianisidine

Get quotes for Dianisidine

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell Dianisidine
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of Dianisidine with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/dianisidine-119-90-4" title="Dianisidine structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Disperse dyes or HS code 320411

29 suppliers
Free quotes, contact stays private
Get quotes