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Food colors

Fast orange

Also known as Permatone Orange, Hansa Orange RN, Light Orange R

CAS 3468-63-1Formula C16H10N4O5Molar mass 338.28 g/molEC 222-429-4
GHS signal word: Warning. Pictograms: Harmful or irritant 19 suppliers listed
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Fast orange chemical structure, C16H10N4O5, CAS 3468-63-1
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Reddish shade of orange
Melting point
302 °C
Density
1.52 No temp
HS code
292700
Category
Food colors
Illustrative photo, a shrink wrapped pallet of kraft paper sacks in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Fast orange?

Plain description, key identifiers and synonyms

Fast orange is a chemical substance with the molecular formula C16H10N4O5 and a molar mass of 338.28 g/mol. Its CAS registry number is 3468-63-1. The IUPAC name is 1-[(2,4-dinitrophenyl)diazenyl]naphthalen-2-ol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-[(2,4-dinitrophenyl)diazenyl]naphthalen-2-ol
CAS number
3468-63-1 CAS number cross-checked
EC number
222-429-4
Molecular formula
C16H10N4O5
UNII
E27LT0986O
MDL number
MFCD00059524
INCI name
PIGMENT ORANGE 5
InChIKey
HBHZKFOUIUMKHV-UHFFFAOYSA-N
InChI
InChI=1S/C16H10N4O5/c21-15-8-5-10-3-1-2-4-12(10)16(15)18-17-13-7-6-11(19(22)23)9-14(13)20(24)25/h1-9,21H
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)C=CC(=C2N=NC3=C(C=C(C=C3)[N+](=O)[O-])[N+](=O)[O-])O

Synonyms

  • Permatone Orange
  • Hansa Orange RN
  • Light Orange R
  • Silopol Orange R
  • Carnelio Red 2G
  • Chromatex Orange R
  • Graphtol Red 2GL
  • Versal Orange RNL
  • Lake Red 2GL
  • Isol Fast Red 2G
  • Calcotone Orange 2R
  • Syton Fast Red 2G
  • Helio Fast Orange RN
  • Lutetia Fast Orange R
  • Brilliant tangerine 13030
  • Irgalite Fast Red 2GL
  • Nippon Orange X-881
  • Segnale Light Orange RNG
  • Dainichi Permanent Red GG
  • Signal Orange Orange Y-17
  • Dinitroaniline Orange ND-204
  • D&C Orange No. 17
  • Permanent Orange
  • Dinitroaniline Orange
  • Dinitroaniline Red
Show all 38 synonyms
  • Permansa Orange
  • Orange No. 203
  • Irgalite Red 2G
  • Permanent Red GG
  • Fastona Red 2G
  • Oralith Red 2GL
  • Siegle Orange 2S
  • Silosol Orange RN
  • Siloton Orange RL
  • Irgalite Red 2GW
  • Irgalite Red PV8
  • Dinitraniline Orange
  • Permanent Orange GG

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
Reddish shade of orangeexp.
Melting point
302 °Cexp.
Density
1.52 No tempexp.

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
338.28 g/molcalc.
Exact mass
338.0651 Dacalc.
LogP (octanol/water)
4.78calc.
Topological polar surface area
131.2 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
7calc.
Rotatable bonds
4calc.
Heavy atoms
25calc.
Rings
3calc.
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, 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

  • H319Causes serious eye irritation.
Precautionary statements (4)
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P337 + P317If eye irritation persists: Get medical help.

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

Fast orange suppliers

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

All 19 suppliers
19 of 19 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

19 suppliers in 4 countries

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Fast orange 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

Finds principle application in air-drying systems, including a variety of printing inks.

Pigment in paints.

Used on a moderately large scale in the printing ink industry.

Industrial uses: Pigment, Dye.

Consumer uses: Pigment, Dye.

Cosmetic ingredient, INCI name PIGMENT ORANGE 5(colorant)

Functional uses

  • Dye
  • Pigment

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 II, prohibited in cosmetics
    Name: Colouring agent CI 12075 (Pigment Orange 5) and its lakes, pigments and salts, Ref no: 397, Annex ref: II/397

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 Fast orange is traded under.

HS 2927.00Indicative HS code

Diazo-, azo- or azoxy compounds

World exports in 2024
$571M
+6.1% vs 2023, imports $525M
2019 to 2024
Top exporters
  1. China47.0%
  2. Indonesia13.1%
  3. Japan9.3%
Top importers
  1. United States10.2%
  2. India * partner reported9.1%
  3. South Korea9.1%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Fast orange, based on the data on this page

What is Fast orange?

Fast orange is a chemical substance with the molecular formula C16H10N4O5 and a molar mass of 338.28 g/mol. Its CAS registry number is 3468-63-1. The IUPAC name is 1-[(2,4-dinitrophenyl)diazenyl]naphthalen-2-ol.

What is the CAS number of Fast orange?

The CAS registry number of Fast orange is 3468-63-1.

What is the molecular formula and weight of Fast orange?

The molecular formula of Fast orange is C16H10N4O5 and its molar mass is 338.28 g/mol.

What is Fast orange used for?

Finds principle application in air-drying systems, including a variety of printing inks. Pigment in paints. Used on a moderately large scale in the printing ink industry. Industrial uses: Pigment, Dye. Consumer uses: Pigment, Dye.

Is Fast orange hazardous?

Fast orange carries the GHS signal word "Warning". Main hazards: causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Fast orange?

Fast orange is usually classified under HS code 292700 (Diazo-, azo- or azoxy-compounds). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Fast orange?

CompoundList lists 19 suppliers of Fast orange in India, United States, China and Brazil. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Fast orange in India?

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

What is the price of Fast orange?

Suppliers quote Fast orange 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 Fast orange

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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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