CompoundList

Basic Red 118

Also known as C.I. Basic Red 118, CI BASIC RED 118, CI 12251:1

CAS 71134-97-9Formula C19H20ClN5O3Molar mass 401.85 g/molEC 275-216-3
Basic Red 118 chemical structure, C19H20ClN5O3, CAS 71134-97-9
2D chemical structure

Key facts

What buyers check first

CAS number
71134-97-9
Formula
C19H20ClN5O3
Molar mass
401.85 g/mol
EC number
275-216-3
HS code
320413
Category
Basic and cationic dyes

What is Basic Red 118?

Plain description, key identifiers and synonyms

Basic Red 118 is a chemical substance with the molecular formula C19H20ClN5O3 and a molar mass of 401.85 g/mol. Its CAS registry number is 71134-97-9. The IUPAC name is [8-[(4-amino-2-nitrophenyl)diazenyl]-7-hydroxynaphthalen-2-yl]-trimethylazanium chloride.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[8-[(4-amino-2-nitrophenyl)diazenyl]-7-hydroxynaphthalen-2-yl]-trimethylazanium chloride
CAS number
71134-97-9 CAS number cross-checked
EC number
275-216-3
Molecular formula
C19H20ClN5O3
UNII
S41N5LA61R
INCI name
BASIC RED 118
InChIKey
WIJOZBDYRBXOOW-UHFFFAOYSA-N
InChI
InChI=1S/C19H19N5O3.ClH/c1-24(2,3)14-7-4-12-5-9-18(25)19(15(12)11-14)22-21-16-8-6-13(20)10-17(16)23(26)27;/h4-11H,1-3H3,(H2-,20,21,22,25);1H
SMILES (canonical and isomeric)
C[N+](C)(C)C1=CC2=C(C=C1)C=CC(=C2N=NC3=C(C=C(C=C3)N)[N+](=O)[O-])O.[Cl-]

Synonyms

  • C.I. Basic Red 118
  • CI BASIC RED 118
  • CI 12251:1
  • C.I. 12251:1
  • 2-Naphthalenaminium, 8-((4-amino-2-nitrophenyl)azo)-7-hydroxy-N,N,N-trimethyl-, chloride
  • 2-Naphthalenaminium, 8-(2-(4-amino-2-nitrophenyl)diazenyl)-7-hydroxy-N,N,N-trimethyl-, chloride (1:1)
  • [8-[(4-Amino-2-nitrophenyl)azo]-7-hydroxy-2-naphthyl]trimethylammonium chloride
  • 8-((4-Amino-2-nitrophenyl)diazenyl)-7-hydroxy-N,N,N-trimethylnaphthalen-2-aminium chloride
  • (8-((4-Amino-2-nitrophenyl)azo)-7-hydroxy-2-naphthyl)trimethylammonium chloride
  • [8-[(4-amino-2-nitrophenyl)diazenyl]-7-hydroxynaphthalen-2-yl]-trimethylazanium, chloride
  • [(8E)-8-[(4-amino-2-nitrophenyl)hydrazinylidene]-7-oxonaphthalen-2-yl]-trimethylazanium, chloride
  • 8-[(4-Amino-2-nitrophenyl)diazenyl]-7-hydroxy-N,N,N-trimethylnaphthalen-2-aminium chloride

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
401.85 g/molcalc.
Exact mass
401.1255 Dacalc.
LogP (octanol/water)
1.65calc.
Topological polar surface area
114.1 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
6calc.
Rotatable bonds
4calc.
Heavy atoms
28calc.
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

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Basic Red 118 suppliers

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Basic Red 118 price

Indicative price range per kg from live supplier offers

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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 RED 118(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
  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: (8-[(4-Amino-2-nitrophenyl)azo]-7-hydroxy-2-naphthyl)trimethylammonium and its salts, (except Basic Red 118 as impurity in Basic brown 17), when used as…

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Basic Red 118 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 Red 118 is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Basic Red 118, based on the data on this page

What is Basic Red 118?

Basic Red 118 is a chemical substance with the molecular formula C19H20ClN5O3 and a molar mass of 401.85 g/mol. Its CAS registry number is 71134-97-9. The IUPAC name is [8-[(4-amino-2-nitrophenyl)diazenyl]-7-hydroxynaphthalen-2-yl]-trimethylazanium chloride.

What is the CAS number of Basic Red 118?

The CAS registry number of Basic Red 118 is 71134-97-9.

What is the molecular formula and weight of Basic Red 118?

The molecular formula of Basic Red 118 is C19H20ClN5O3 and its molar mass is 401.85 g/mol.

What is Basic Red 118 used for?

Use classes: Cosmetics.

Is Basic Red 118 hazardous?

No GHS hazard classification for Basic Red 118 is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Basic Red 118?

Basic Red 118 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 Red 118?

Post a free request on CompoundList and suppliers of Basic Red 118 will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Basic Red 118?

Suppliers quote Basic Red 118 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 Red 118

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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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