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Acid Yellow 42

Acid Yellow 42 Structure
Acid Yellow 42 structure
CAS No.
6375-55-9
Chemical Name:
Acid Yellow 42
Synonyms
c.i.22910;acidyellowk;Acid Yellow R;ACID YELLOW 42;optanolyellowr;Acid Yellow FG;millingyellow3g;millingyellow3j;millingyellowrx;supranolyellowr
CBNumber:
CB7719987
Molecular Formula:
C32H27N8NaO8S2
Molecular Weight:
738.73
MDL Number:
MFCD00003139
MOL File:
6375-55-9.mol
MSDS File:
SDS
Last updated:2026-06-03 22:13:54
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Acid Yellow 42 Properties

Density 1.617[at 20℃]
Water Solubility 17.27g/L at 20℃
InChIKey XYNGYONLRYFQNO-UUIOKUIJSA-N
SMILES S(C1C=C(/N=N/C2C(=NN(C3C=CC=CC=3)C2=O)C)C=CC=1C1C=CC(/N=N/C2C(=NN(C3C=CC=CC=3)C2=O)C)=CC=1S(O)(=O)=O)(O)(=O)=O.[NaH]
LogP -1.122 at 20℃
EPA Substance Registry System C.I. Acid Yellow 42, disodium salt (6375-55-9)

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H319-H317
Precautionary statements  P264-P280-P305+P351+P338-P337+P313P-P261-P272-P280-P302+P352-P333+P313-P321-P363-P501
TSCA  TSCA listed
REACH Registrations Active

Acid Yellow 42 price

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich R301264 CALCOCID MILLING YELLOW R AldrichCPR 6375-55-9 1G $29.8 2024-03-01 Buy
aablocks AA01DNPS Acid Yellow 42 90.0% 6375-55-9 5g $82 2026-05-29 Buy
American Custom Chemicals Corporation DYE0000116 ACID YELLOW 42 95.00% 6375-55-9 5MG $500.05 2021-12-16 Buy
Product number Packaging Price Buy
R301264 1G $29.8 Buy
AA01DNPS 5g $82 Buy
DYE0000116 5MG $500.05 Buy

Acid Yellow 42 Chemical Properties,Uses,Production

Chemical Properties

Bright yellow powder. Soluble in water, aqueous solution is lemon yellow. Aqueous solution added concentrated hydrochloric acid, concentrated sodium hydroxide, the color does not change. Soluble in ethanol is lemon yellow, slightly soluble in acetone. Lemon yellow in concentrated sulfuric acid, the color is unchanged after dilution. When stained with copper ions, the color becomes slightly reddish dark, when encountered with iron ions, the color becomes dark green, when encountered with chromium ions, the color remains unchanged.

Uses

C.I. Acid yellow 42 is an acidic yellow dye that can be adsorbed and removed by bentone.

Preparation

2,2′-Disulfo-4,4,diaminobibenzene double nitriding, and 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one (2 Moore) coupled.

Flammability and Explosibility

Not classified

Properties and Applications

yellow to red light yellow. Bright yellow powder. A lemon yellow soluble in water, soluble in ethanol is lemon yellow, slightly soluble in acetone. Meet strong sulfuric acid is lemon yellow, dilute still is shown after lemon yellow. Its water solution meet strong hydrochloric acid is lemon yellow; Sodium hydroxide solution meet strong a lemon yellow. In dyeing of copper (a little red dark, encounter chromium ion unchanged, encounter iron ion turn green dark. Mainly used for wool dyeing and can be used for wool, silk and glue directly printing, has the good discharge sex, can be used for the polyamide fiber dyeing and leather shading.

Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater
Fading Stain Fading Stain Fading Stain
ISO 4-5 4-5 5 4-5 4 5 4 5
AATCC 4 4-5 4-5 4-5 1 2-3 4-5 4-5

References

[1] Baskaralingam P, Pulikesi M, Elango D, et al. Adsorption of acid dye onto organobentonite[J]. Journal of hazardous materials, 2006, 128(2-3): 138-144.

Acid Yellow 42 Preparation Products And Raw materials

Raw materials

1,2-Dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one Benzidine 5-Methyl-2-phenyl-1,2-dihydropyrazol-3-one 2,2'-Benzidinedisulfonic acid

Preparation Products

Acid Yellow 42 Suppliers

Global( 116)Suppliers
Supplier Tel Email Country ProdList Advantage
Winchem Industrial Co. Ltd 0574-83851061 info@win-chemical.com China 500 55
Tianjin heowns Biochemical Technology Co., Ltd. 400 638 7771 sales@heowns.com China 14412 57
The future of Shanghai Industrial Co., Ltd. 021-61552785 sales@shshiji.com China 9531 55
Shanghai JONLN Reagent Co., Ltd. 400-0066400 13621662912 422131432@qq.com China 9970 55
Hangzhou Sunshine Chemicals Co., Ltd 0086-571-88523165 wangjf@aciddyes.com China 98 62
Alfa Chemistry 1-516-6625404 support@alfa-chemistry.com United States 9170 60
Shijiazhuang Yesheng Chemical Technology Co., Ltd 18031147013 18031147013; yeshengchemical@163.com China 2673 58
Shanghai Orgchem Co.,Ltd. +86-21-5877 1921 info@chemofchina.com China 9630 55
Nanjing FNAT Chemical Co.,Ltd. +86-25-86442672 13451895519 amywang@fnatchem.com China 69 58
Henan Alfa Chemical Co., Ltd +8618339805032 sale03@alfachem.cn China 9872 58
Supplier Advantage
Winchem Industrial Co. Ltd 55
Tianjin heowns Biochemical Technology Co., Ltd. 57
The future of Shanghai Industrial Co., Ltd. 55
Shanghai JONLN Reagent Co., Ltd. 55
Hangzhou Sunshine Chemicals Co., Ltd 62
Alfa Chemistry 60
Shijiazhuang Yesheng Chemical Technology Co., Ltd 58
Shanghai Orgchem Co.,Ltd. 55
Nanjing FNAT Chemical Co.,Ltd. 58
Henan Alfa Chemical Co., Ltd 58

View Lastest Price from Acid Yellow 42 manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Acid Yellow 42 pictures 2026-09-11 Acid Yellow 42
6375-55-9
 25kg 1 20MT Winchem industrial co limited
Tracid Yellow MR, Acid Yellow 42 pictures 2022-10-28 Tracid Yellow MR, Acid Yellow 42
6375-55-9
 $3.00 25kg 99% 20 tons TIANJIN XIANGRUI DYESTUFF CO.,LTD

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BENZYL FAST YELLOW RS COOMASSIE YELLOW R CI ACID YELLOW 42 CALCOCID MILLING YELLOW R ACID YELLOW 42 SULPHON YELLOW RS-CF [1,1’-biphenyl]-2,2’-disulfonicacid,4,4’-bis[(4,5-dihydro-3-methyl-5-oxo-1-ph [1,1’-Biphenyl]-2,2’-disulfonicacid,4,4’-bis[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-,disodiumsalt ZNXPDFXRNNYJGJ-YNCRMFOQSA-N acidanthraceneyellowgr acidfastyellowmr acidleatheryellowcrs acidyellow42(c.i.22910) acidyellowk airedaleyellow3gm amacidfastyellowrs belacidmillingyellowr c.i.22910 c.i.acidyellow42disodiumsalt coomassieyellowrp cyaninefastyellowm eriofastyellowrl fastsilkyellowsh kcaacidmillingyellowm midlonyellowpropyl millingyellow3g millingyellow3j millingyellowrx naphthaleneleatheryellow2g optanolyellowr pharmacineyellowr pharmatexyellowg shikisoacidfastyellowmr sulfonineyellowcsr suminolmillingyellowmr supranolyellowr symulonacidfastyellowmr tertracidmillingyellowr xylenemillingyellowsh Disodium 4,4'-bis[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-[1,1'-biphenyl]-2,2'-disulfonate Milling Yellow N-SH Acid Fast Yellow R Acid Milling Yellow M Acid Yellow FG Acid Yellow R Aminyl Yellow F-MR Anadurm Yellow M-G Concorde Acid Yellow M-GR Covalene Yellow MR Dermacid Yellow 2R Dycosacid Leather Yellow MR Eniacid Fast Yellow R Everacid Milling Yellow MR Kenanthrol Yellow R Lecotan Yellow SH Milling Fast Yellow R Naphthazine Yellow MR Sandolan Milling Yellow N-SH