ACID YELLOW 42

Modify Date: 2026-06-30 17:20:09

ACID YELLOW 42 structure	Common Name	ACID YELLOW 42
	CAS Number	6375-55-9	Molecular Weight	758.691
	Density	N/A	Boiling Point	N/A
	Molecular Formula	C₃₂H₂₄N₈Na₂O₈S₂	Melting Point	N/A
	MSDS	N/A	Flash Point	N/A

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name	disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate
Synonym	More Synonyms

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

Molecular Formula	C₃₂H₂₄N₈Na₂O₈S₂
Molecular Weight	758.691
Exact Mass	758.095398
PSA	245.94000
LogP	6.07460
InChIKey	ZRYQXQUPWQNYSX-UHFFFAOYSA-L
SMILES	CC1=NN(c2ccccc2)C(=O)C1N=Nc1ccc(-c2ccc(N=NC3C(=O)N(c4ccccc4)N=C3C)cc2S(=O)(=O)[O-])c(S(=O)(=O)[O-])c1.[Na+].[Na+]

This table summarizes toxicological test data, acute & chronic toxicity and ecological hazard parameters for this chemical.

CHEMICAL IDENTIFICATION

RTECS NUMBER :: DV3910000

CHEMICAL NAME :: (1,1'-Biphenyl)-2,2'-disulfonic acid, 4,4'-bis((4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H- pyrazol-4-yl)azo)-, disodium salt

CAS REGISTRY NUMBER :: 6375-55-9

LAST UPDATED :: 199701

DATA ITEMS CITED :: 4

MOLECULAR FORMULA :: C32-H24-N8-O8-S2.2Na

MOLECULAR WEIGHT :: 758.74

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

MUTATION DATA

TYPE OF TEST :: Mutation in microorganisms

TEST SYSTEM :: Bacteria - Salmonella typhimurium

DOSE/DURATION :: 500 ug/plate

REFERENCE :: VHTODE Veterinary and Human Toxicology. (American College of Veterinary and Comparative Toxicology, Publication Office, Comparative Toxicology, Manhattan, KS 66506) V.19- 1977- Volume(issue)/page/year: 22,413,1980 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - M3153 No. of Facilities: 68 (estimated) No. of Industries: 1 No. of Occupations: 10 No. of Employees: 1106 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - M3153 No. of Facilities: 36 (estimated) No. of Industries: 1 No. of Occupations: 2 No. of Employees: 896 (estimated)

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

HS Code	3204120000

This table shows customs‑related data including HS‑code, tariff and regulatory conditions for import and export.

HS Code	3204120000

This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

Supranol Yellow R

Coomassie Yellow R

EINECS 228-940-9

Milling Yellow RX

Disodium 4,4'-bis[(E)-(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl)diazenyl]-2,2'-biphenyldisulfonate

Acid Yellow K

ACID YELLOW 42

Milling Yellow 3G

Optanol Yellow R

Acid Fast Yellow MR

MFCD00003139

Pharmatex Yellow G

[1,1'-Biphenyl]-2,2'-disulfonic acid, 4,4'-bis[(E)-2-(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)diazenyl]-, sodium salt (1:2)

Milling Yellow 3J

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What is the molecular formula of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate?

A: Molecular formula of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate is C32H24N8Na2O8S2.

Q: What is the CAS number of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate?

A: CAS number of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate is 6375-55-9.

Q: What is the LogP of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate?

A: LogP of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate is 6.07460.

Q: What is the English name of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate?

A: The English name of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate is disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate.

Q: What is the SMILES notation of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate?

A: SMILES notation of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate is CC1=NN(c2ccccc2)C(=O)C1N=Nc1ccc(-c2ccc(N=NC3C(=O)N(c4ccccc4)N=C3C)cc2S(=O)(=O)[O-])c(S(=O)(=O)[O-])c1.[Na+].[Na+].

Q: What is the molecular weight of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate?

A: Molecular weight of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate is 758.691.

Q: What is the InChIKey of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate?

A: InChIKey of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate is ZRYQXQUPWQNYSX-UHFFFAOYSA-L.

Q: What is the polar surface area (PSA) of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate?

A: Polar surface area (PSA) of disodium,5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate is 245.94000.

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Dayang Chem (Hangzhou) Co., Ltd.

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Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Palmitic acid
Price: Check
Purity: 98.0%
Delivery: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: disodium 4,4'-bis(5-hydroxy-3-methyl-1-phenyl-1H-pyrazol-4-ylazo)-1,1'-biphenyl-2,6'-disulphonate
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Delivery: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

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ACID YELLOW 42

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ACUTE TOXICITY DATA

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