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Direct dyes

Direct Brown 2

Also known as Direct Fast Brown M, CI Direct Brown 2, Azocard Brown M

CAS 2429-82-5Formula C29H19N5Na2O7SMolar mass 627.55 g/molEC 219-391-6
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard, Hazardous to the environment 6 suppliers listed
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Direct Brown 2 chemical structure, C29H19N5Na2O7S, CAS 2429-82-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2429-82-5
Formula
C29H19N5Na2O7S
Physical form
Solid
Solubility
1 to 10 mg/mL at 68 °F
HS code
320414
Category
Direct dyes
Illustrative photo, 25 kg white woven sacks of powder on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Direct Brown 2?

Plain description, key identifiers and synonyms

Reddish-brown solid or dark brown powder. (NTP, 1992)

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
disodium, 5-[[4-[4-[(7-amino-1-hydroxy-3-sulfonatonaphthalen-2-yl)diazenyl]phenyl]phenyl]diazenyl]-2-hydroxybenzoate
CAS number
2429-82-5 CAS number cross-checked
EC number
219-391-6
Molecular formula
C29H19N5Na2O7S
UNII
35C7Y2E3X5
InChIKey
CXAVOCVLMJULES-UHFFFAOYSA-L
InChI
InChI=1S/C29H21N5O7S.2Na/c30-19-6-1-18-13-26(42(39,40)41)27(28(36)23(18)14-19)34-32-21-9-4-17(5-10-21)16-2-7-20(8-3-16)31-33-22-11-12-25(35)24(15-22)29(37)38;;/h1-15,35-36H,30H2,(H,37,38)(H,39,40,41);;/q;2*+1/p-2
SMILES (canonical and isomeric)
C1=CC(=CC=C1C2=CC=C(C=C2)N=NC3=C(C=C4C=CC(=CC4=C3O)N)S(=O)(=O)[O-])N=NC5=CC(=C(C=C5)O)C(=O)[O-].[Na+].[Na+]

Synonyms

  • Direct Fast Brown M
  • CI Direct Brown 2
  • Azocard Brown M
  • Direct Brown M
  • Union Brown DR
  • C.I. Direct Brown 2
  • Azocord Brown M
  • Azomine Brown M
  • Diamine Brown M
  • Diazine Brown M
  • Fenamin Brown M
  • Fixanol Brown M
  • Japanol Brown M
  • Diazol Brown M
  • Mahogany EMBL
  • Amanil Brown MR
  • Atlantic Brown M
  • Azine Brown M
  • Benzanil Brown M
  • Benzanol Brown M
  • Benzo Brown M
  • Columbia Brown M
  • Diphenyl Brown V
  • Direct Brown MB
  • Direct Brown MR
Show all 39 synonyms
  • Direct Brown RC
  • Neklamin Brown M
  • Vondacel Brown M
  • Benzo Brown MC
  • Brown M
  • Diazo Brown MC
  • Pheno Brown MRS
  • Cutamin Brown CM
  • Diamine Brown MR
  • Direct Brown KKh
  • Orbamin Brown MS
  • Chlorazol Brown M
  • Diacotton Brown M
  • Direct Brown RMR

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

Physical form
Solidexp.
Solubility
1 to 10 mg/mL at 68 °Fexp.

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
627.55 g/molcalc.
Exact mass
627.0801 Dacalc.
LogP (octanol/water)
-0.39calc.
Topological polar surface area
213.3 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
12calc.
Rotatable bonds
7calc.
Heavy atoms
44calc.
Rings
5calc.
Aromatic rings
5calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
Lipinski rule of five
Fails (2 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(N=Nc2ccc(-c3ccc(N=Nc4ccc5ccccc5c4)cc3)cc2)cc1

c1ccc(N=Nc2ccc(-c3ccc(N=Nc4ccc5ccccc5c4)cc3)cc2)cc1

5 rings, 32 atoms.

32 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
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H350May cause cancer.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (11)
  • P203Obtain, read and follow all safety instructions before use.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • 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.
  • P391Collect spillage.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Direct Brown 2 suppliers

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

All 6 suppliers
6 of 6 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

6 suppliers in 2 countries

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Direct Brown 2 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.

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Uses and applications

What the substance is used for, by industry and function

Dye for coloring and printing cellulose and nylon fibers, for silk, wool, paper, leather, cosmetics.

Industries and functions

How it is made

Coupling of tetrazotized benzidine with salicyclic acid, then coupling with gamma acid under alkaline conditions

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Inactive in US commerce, Regulatory flags: Significant new use rule

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Direct Brown 2 is traded under.

HS 3204.14Indicative HS code

Direct dyes and preparations based thereon

World exports in 2024
$328M
−1.5% vs 2023, imports $336M
2019 to 2024
Top exporters
  1. India * partner reported34.9%
  2. China11.3%
  3. Spain9.0%
Top importers
  1. Italy9.8%
  2. Germany8.7%
  3. Netherlands7.8%

* Partner reported figures, a lower bound.

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

The HS code shown for Direct Brown 2 is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Direct Brown 2, based on the data on this page

What is Direct Brown 2?

Reddish-brown solid or dark brown powder. (NTP, 1992)

What is the CAS number of Direct Brown 2?

The CAS registry number of Direct Brown 2 is 2429-82-5.

What is the molecular formula and weight of Direct Brown 2?

The molecular formula of Direct Brown 2 is C29H19N5Na2O7S and its molar mass is 627.55 g/mol.

What is Direct Brown 2 used for?

Dye for coloring and printing cellulose and nylon fibers, for silk, wool, paper, leather, cosmetics.

Is Direct Brown 2 hazardous?

Direct Brown 2 carries the GHS signal word "Danger". Main hazards: harmful if swallowed, may cause cancer, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Direct Brown 2?

Direct Brown 2 is usually classified under HS code 320414 (Direct dyes and preparations based thereon). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Direct Brown 2?

CompoundList lists 6 suppliers of Direct Brown 2 in China and India. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Direct Brown 2 in India?

2 suppliers in India list Direct Brown 2 on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Direct Brown 2?

Suppliers quote Direct Brown 2 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 Direct Brown 2

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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