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Solvent Red 3

CAS No.
6535-42-8
Chemical Name:
Solvent Red 3
Synonyms
CI 12010;Brown BB;FAT BROWN B;SOLVENT RED 3;c.i.solventred3;Solvent Red 3 (C.I.);Fat brown B (C.I. 12010);Solvent Red 3(C.I. 12010);C.I.Solvent Red 3:C.I.12010;4-[(4-Ethoxyphenyl)azo]naphthol
CBNumber:
CB6359254
Molecular Formula:
C18H16N2O2
Molecular Weight:
292.33
MDL Number:
MFCD00009691
MOL File:
6535-42-8.mol
MSDS File:
SDS
Last updated:2026-05-20 15:44:38
Product description Number Pack Size Price
Fat Brown B F3257 25g $41.65
Fat Brown B 41972 25G $77.92
Solvent Red 3 AA00E950 25g $71
Solvent Red 3 AA00E950 100g $196
FatBrownB,Tech. T809 25g $57.5
More product size

Solvent Red 3 Properties

Melting point 152-155 °C
Boiling point 510.5±30.0 °C(Predicted)
Density 1.17±0.1 g/cm3(Predicted)
storage temp. room temp
solubility ethanol: 1mg/mL
Colour Index 12010
pka 8.39±0.40(Predicted)
form powder
color brown to dark brown
Major Application diagnostic assay manufacturing
hematology
histology
Cosmetics Ingredients Functions HAIR DYEING
COLORANT
InChI 1S/C18H16N2O2/c1-2-22-14-9-7-13(8-10-14)19-20-17-11-12-18(21)16-6-4-3-5-15(16)17/h3-12,21H,2H2,1H3/b20-19+
InChIKey JSEYDVLGSMLKDL-FMQUCBEESA-N
SMILES CCOc1ccc(cc1)\N=N\c2ccc(O)c3ccccc23
LogP 3.824 (est)
EWG's Food Scores 2-5
FDA UNII XNW2E18207
EPA Substance Registry System 1-Naphthalenol, 4-[(4-ethoxyphenyl)azo]- (6535-42-8)
UNSPSC Code 12171500
NACRES NA.47

SAFETY

Risk and Safety Statements

WGK Germany  3
TSCA  TSCA listed
Storage Class 11 - Combustible Solids

Solvent Red 3 price More Price(7)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich F3257 Fat Brown B 6535-42-8 25g $41.65 2026-04-30 Buy
Chem-Impex 41972 Fat Brown B 6535-42-8 25G $77.92 2026-05-19 Buy
aablocks AA00E950 Solvent Red 3 6535-42-8 25g $71 2026-05-28 Buy
aablocks AA00E950 Solvent Red 3 6535-42-8 100g $196 2026-05-28 Buy
AK Scientific T809 FatBrownB,Tech. 6535-42-8 25g $57.5 2021-12-16 Buy
Product number Packaging Price Buy
F3257 25g $41.65 Buy
41972 25G $77.92 Buy
AA00E950 25g $71 Buy
AA00E950 100g $196 Buy
T809 25g $57.5 Buy

Solvent Red 3 Chemical Properties,Uses,Production

Uses

Fat Brown B is a stain/dye. Dyes and metabolites.

Preparation

4-Ethoxybenzenamine diazotization, and Naphthalen-1-ol coupling.

Properties and Applications

bordeaux. Dark yellow crystallization, melting point is 168 ℃. Soluble in ethanol, acetone and benzene.

Standard Light Fastness Heat-resistant(℃) water Sodium Carbonate(5%) Hydrochloric acid(5%)
Melting point Stable
ISO Poor-General 146-149 120 Insoluble General No change

Solvent Red 3 Preparation Products And Raw materials

Raw materials

Preparation Products

Global( 67)Suppliers
Supplier Tel Email Country ProdList Advantage
Hefei TNJ Chemical Industry Co.,Ltd.
+86-0551-65418671 +86-189 4982 3763 sales@tnjchem.com China 34563 58
ANHUI WITOP BIOTECH CO., LTD
+8618071025641 eric@witopchemical.com China 23541 58
Dideu Industries Group Limited
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AFINE CHEMICALS LIMITED
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HANGZHOU LEAP CHEM CO., LTD.
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Aladdin Scientific
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Shanghai Xinchem
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DAYANG CHEM (HANGZHOU) CO.,LTD
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Hangzhou J&H Chemical Co., Ltd. 0571-87396432 sales@jhechem.com China 14916 59
Sigma-Aldrich 021-61415566 800-8193336 orderCN@merckgroup.com China 51395 80
4-[(4-ethoxyphenyl)azo]-1-naphthaleno c.i.solventred3 FAT BROWN B 4-((4-ethoxyphenyl)azo)-1-naphthalenol 4-[(4-Ethoxyphenyl)azo]naphthol SOLVENT RED 3 4-(4-ethoxyphenyl)azo-1-naphthol Solvent Red 3 (C.I.) 1-Naphthalenol, 4-(4-ethoxyphenyl)azo- Fat brown B (C.I. 12010) Brown BB (4E)-4-[(4-ethoxyphenyl)hydrazinylidene]naphthalen-1-one Solvent Red 3 ISO 9001:2015 REACH C.I.Solvent Red 3:C.I.12010 Solvent Red 3(C.I. 12010) CI 12010 6535-42-8 Solvent Dyestuff Organics