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Basic and cationic dyes

Basic Brown 16

Also known as Arianor Mahogany, C.I. 12250, C.I. BASIC BROWN 16

CAS 26381-41-9Formula C19H21ClN4OMolar mass 356.86 g/molEC 247-640-9
GHS signal word: Warning. Pictograms: Harmful or irritant 3 suppliers listed
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Basic Brown 16 chemical structure, C19H21ClN4O, CAS 26381-41-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
26381-41-9
Formula
C19H21ClN4O
Molar mass
356.86 g/mol
EC number
247-640-9
HS code
320413
Category
Basic and cationic dyes

What is Basic Brown 16?

Plain description, key identifiers and synonyms

Basic Brown 16 is a chemical substance with the molecular formula C19H21ClN4O and a molar mass of 356.86 g/mol. Its CAS registry number is 26381-41-9. The IUPAC name is [8-[(4-aminophenyl)diazenyl]-7-hydroxynaphthalen-2-yl]-trimethylazanium chloride.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[8-[(4-aminophenyl)diazenyl]-7-hydroxynaphthalen-2-yl]-trimethylazanium chloride
CAS number
26381-41-9 CAS number cross-checked
EC number
247-640-9
Molecular formula
C19H21ClN4O
UNII
QEJ5GK0TG1
MDL number
MFCD07776999
INCI name
BASIC BROWN 16
InChIKey
UXEAWNJALIUYRH-UHFFFAOYSA-N
InChI
InChI=1S/C19H20N4O.ClH/c1-23(2,3)16-10-4-13-5-11-18(24)19(17(13)12-16)22-21-15-8-6-14(20)7-9-15;/h4-12H,1-3H3,(H2-,20,21,22,24);1H
SMILES (canonical and isomeric)
C[N+](C)(C)C1=CC2=C(C=C1)C=CC(=C2N=NC3=CC=C(C=C3)N)O.[Cl-]

Synonyms

  • Arianor Mahogany
  • C.I. 12250
  • C.I. BASIC BROWN 16
  • Arianor mahogany 306002
  • Arianor mahogany-306002
  • CI 12250
  • 8-(4'-Aminophenylazo)-7-hydroxy-2-naphthyltrimethylammonium chloride
  • 2-Naphthalenaminium, 8-(2-(4-aminophenyl)diazenyl)-7-hydroxy-N,N,N-trimethyl-, chloride (1:1)
  • 2-Naphthalenaminium, 8-[2-(4-aminophenyl)diazenyl]-7-hydroxy-N,N,N-trimethyl-, chloride (1:1)
  • [8-[(4-aminophenyl)diazenyl]-7-hydroxynaphthalen-2-yl]-trimethylazanium, chloride
  • 2-Naphthalenaminium, 8-[(4-aminophenyl)azo]-7-hydroxy-N,N,N-trimethyl-, chloride
  • 8-((4-Aminophenyl)diazenyl)-7-hydroxy-N,N,N-trimethylnaphthalen-2-aminium chloride
  • Arianor Mahogany (Technical Grade)
  • Basic Brown
  • (8-((p-Aminophenyl)azo)-7-hydroxy-2-naphthyl)trimethylammonium chloride
  • [8-[(p-aminophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammonium chloride
  • Ammonium, (8-((p-aminophenyl)azo)-7-hydroxy-2-naphthyl)trimethyl-, chloride
  • 2-Naphthalenaminium, 8-((4-aminophenyl)azo)-7-hydroxy-N,N,N-trimethyl-, chloride
  • 8-[(4-Aminophenyl)diazenyl]-7-hydroxy-N,N,N-trimethylnaphthalen-2-aminium Chloride
  • Basicbrown16

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
356.86 g/molcalc.
Exact mass
356.1404 Dacalc.
LogP (octanol/water)
1.74calc.
Topological polar surface area
70.97 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
3calc.
Heavy atoms
25calc.
Rings
3calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0.16calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
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(N=Nc2cccc3ccccc23)cc1

c1ccc(N=Nc2cccc3ccccc23)cc1

3 rings, 18 atoms, the Diazene, naphthalenylphenyl- ring system.

1,098 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H317May cause an allergic skin reaction.
  • H319Causes serious eye irritation.
Precautionary statements (11)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • 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

Basic Brown 16 suppliers

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

All 3 suppliers

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

3 suppliers in 3 countries

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Basic Brown 16 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

Use classes: Cosmetics.

Cosmetic ingredient, INCI name BASIC BROWN 16(hair dyeing)

Functional uses

  • Dye

Cosmetic functions

  • Hair dyeing

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

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 Basic Brown 16 is traded under.

HS 3204.13Indicative HS code

Basic dyes and preparations based thereon

World exports in 2024
$209M
−2.6% vs 2023, imports $224M
2019 to 2024
Top exporters
  1. India * partner reported27.9%
  2. China21.8%
  3. Spain6.6%
Top importers
  1. United States11.2%
  2. China7.9%
  3. Germany7.4%

* Partner reported figures, a lower bound.

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

The HS code shown for Basic Brown 16 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Basic Brown 16, based on the data on this page

What is Basic Brown 16?

Basic Brown 16 is a chemical substance with the molecular formula C19H21ClN4O and a molar mass of 356.86 g/mol. Its CAS registry number is 26381-41-9. The IUPAC name is [8-[(4-aminophenyl)diazenyl]-7-hydroxynaphthalen-2-yl]-trimethylazanium chloride.

What is the CAS number of Basic Brown 16?

The CAS registry number of Basic Brown 16 is 26381-41-9.

What is the molecular formula and weight of Basic Brown 16?

The molecular formula of Basic Brown 16 is C19H21ClN4O and its molar mass is 356.86 g/mol.

What is Basic Brown 16 used for?

Use classes: Cosmetics.

Is Basic Brown 16 hazardous?

Basic Brown 16 carries the GHS signal word "Warning". Main hazards: may cause an allergic skin reaction, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Basic Brown 16?

Basic Brown 16 is usually classified under HS code 320413 (Basic dyes and preparations based thereon). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Basic Brown 16?

CompoundList lists 3 suppliers of Basic Brown 16 in China, India and Italy. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Basic Brown 16 in India?

1 supplier in India list Basic Brown 16 on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Basic Brown 16?

Suppliers quote Basic Brown 16 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 Basic Brown 16

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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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