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Vat and sulfur dyes

Indigo

Also known as Indigotin, Indigo Blue, Vat blue 1

CAS 482-89-3Formula C16H10N2O2Molar mass 262.27 g/molEC 207-586-9
GHS signal word: Warning. Pictograms: Serious health hazard 86 suppliers listed
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Indigo chemical structure, C16H10N2O2, CAS 482-89-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
482-89-3
Formula
C16H10N2O2
Molar mass
262.27 g/mol
EC number
207-586-9
HS code
320415
Category
Vat and sulfur dyes

What is Indigo?

Plain description, key identifiers and synonyms

Indigo dye is a member of hydroxyindoles.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-(3-hydroxy-1H-indol-2-yl)indol-3-one
CAS number
482-89-3 CAS number cross-checkedOther or deprecated CAS: 12626-73-2, 2001554-70-5, 64784-13-0, 68651-46-7
EC number
207-586-9
Molecular formula
C16H10N2O2
UNII
1G5BK41P4F
MDL number
MFCD00005722
INCI name
CI 73000
InChIKey
QQILFGKZUJYXGS-UHFFFAOYSA-N
InChI
InChI=1S/C16H10N2O2/c19-15-9-5-1-3-7-11(9)17-13(15)14-16(20)10-6-2-4-8-12(10)18-14/h1-8,17,19H
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)C(=C(N2)C3=NC4=CC=CC=C4C3=O)O

Synonyms

  • Indigotin
  • Indigo Blue
  • Vat blue 1
  • Cystoceva
  • Diindogen
  • Indigo (synthetic)
  • Vulcafix Blue R
  • Indigo Pure BASF
  • Indigo Ciba
  • Indigo Synthetic
  • Synthetic Indigo
  • Indigo Powder W
  • Vulcafor Blue A
  • Indigo J
  • Indigo N
  • Indigo P
  • Vynamon Blue A
  • Indigo VS
  • Indigo Ciba SL
  • indigo dye
  • Indigo NAC
  • Indigo PLN
  • Indigo NACCO
  • C.I. Vat Blue 1
  • Mitsui Indigo Pure
Show all 39 synonyms
  • Mitsui Indigo Paste
  • Synthetic Indigo TS
  • Vulcol Fast Blue GL
  • Lithosol Deep Blue B
  • Vulcanosine Dark Blue L
  • D&C Blue No. 6
  • Blue No. 201
  • D and C Blue No. 6
  • Lithosol deep blue V
  • Indigo,natural
  • Indigo Pure BASF Powder K
  • 11669 Blue
  • Monolite Fast Navy Blue BV
  • 3H-Indol-3-one, 2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-

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
262.27 g/molcalc.
Exact mass
262.0742 Dacalc.
LogP (octanol/water)
3.19calc.
Topological polar surface area
65.45 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
1calc.
Heavy atoms
20calc.
Rings
4calc.
Aromatic rings
3calc.
Fraction sp3 carbons
0calc.
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, O=C1C(c2cc3ccccc3[nH]2)=Nc2ccccc21

O=C1C(c2cc3ccccc3[nH]2)=Nc2ccccc21

4 rings, 19 atoms.

35 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H373May cause damage to organs through prolonged or repeated exposure.
Precautionary statements (3)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P319Get medical help if you feel unwell.
  • 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

Indigo suppliers

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

All 86 suppliers
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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

86 suppliers in 17 countries

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Indigo 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 CI 73000(colorant)

Functional uses

  • Dye
  • Surface modifier

Cosmetic functions

  • Colorant

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • EU Cosmetics Regulation Annex IV, allowed colourant
    Name: CI 73000, Ref no: 98, Annex ref: IV/98

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 Indigo is traded under.

HS 3204.15Indicative HS code

Vat dyes (including those usable in that state as pigments) and preparations based thereon

World exports in 2024
$435M
−7.3% vs 2023, imports $357M
2019 to 2024
Top exporters
  1. China60.2%
  2. Singapore10.7%
  3. India * partner reported8.7%
Top importers
  1. India * partner reported17.1%
  2. Turkey10.7%
  3. Singapore10.6%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Indigo?

Indigo dye is a member of hydroxyindoles.

What is the CAS number of Indigo?

The CAS registry number of Indigo is 482-89-3. Other or deprecated CAS numbers: 12626-73-2, 2001554-70-5, 64784-13-0.

What is the molecular formula and weight of Indigo?

The molecular formula of Indigo is C16H10N2O2 and its molar mass is 262.27 g/mol.

What is Indigo used for?

Use classes: Cosmetics.

Is Indigo hazardous?

Indigo carries the GHS signal word "Warning". Main hazards: may cause damage to organs through prolonged or repeated exposure. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Indigo?

Indigo is usually classified under HS code 320415 (Vat dyes (including those usable in that state as pigments) and preparations based thereon). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Indigo?

CompoundList lists 86 suppliers of Indigo in China, United States, United Kingdom, Canada and 13 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Indigo?

Suppliers quote Indigo 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 Indigo

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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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