Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Vat Blue 4B
Price: Check
Purity: 98.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

DC Chemicals Limited
China
Product Name: Tetrabromoindigo
Price: $Inquiry/100mg $Inquiry/250mg $Inquiry/500mg
Purity: 98.0%
Stocking Period: 3 Day
Contact: Tony Cao
Email: sales@dcchemicals.com

Henan Tianfu Chemical Co., Ltd.
China
Product Name: TIANFU-CHEM CAS:2475-31-2 Vat Blue 4B
Price: $Inquiry/1kg $Inquiry/25kg $Inquiry/1000kg $Inquiry/10ton
Purity: 99.0%
Stocking Period: Inquiry
Contact: Anson
Email: info@tianfuchem.com

2475-31-2

2475-31-2 structure

2475-31-2 structure

Name: Vat Blue 4B
Chemical Name: (2Z)-5,7-dibromo-2-(5,7-dibromo-3-oxo-1H-indol-2-ylidene)-1H-indol-3-one
CAS Number: 2475-31-2
Molecular Formula: C₁₆H₆Br₄N₂O₂
Molecular Weight: 577.84700
Catalog: Dyes and pigments dye Reduced dye
Create Date: 2018-02-05 08:00:00
Modify Date: 2025-08-25 18:23:13

Name	(2Z)-5,7-dibromo-2-(5,7-dibromo-3-oxo-1H-indol-2-ylidene)-1H-indol-3-one
Synonyms	5,5',7,7'-Tetrabromoindigo Ciba Brilliant Blue BS Tetrabromoindigo Indigo 4B 5,5',7,7'-tetrabromoindigo red Vat Blue 4B Tetra Blue 2B EINECS 219-598-1 Bromindigo 2BD MFCD00049382 Durindone Blue 4B Arlanone Blue 2B Ciba Blue 2B Bromindigo

Density	2.313g/cm3
Boiling Point	563.4ºC at 760mmHg
Molecular Formula	C₁₆H₆Br₄N₂O₂
Molecular Weight	577.84700
Flash Point	294.5ºC
Exact Mass	573.71600
PSA	58.20000
LogP	6.14080
Vapour Pressure	1.02E-12mmHg at 25°C
Index of Refraction	1.762

CHEMICAL IDENTIFICATION

RTECS NUMBER :: NM3259100

CHEMICAL NAME :: 3H-Indol-3-one, 1,2-dihydro-5,7-dibromo-2-(5,7-dibromo-1,3-dihydro-3- oxo-2H-indol-2-yliden e)-

CAS REGISTRY NUMBER :: 2475-31-2

LAST UPDATED :: 199701

DATA ITEMS CITED :: 3

MOLECULAR FORMULA :: C16-H6-Br4-N2-O2

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 5700 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 27(8),54,1983 ** OTHER MULTIPLE DOSE TOXICITY DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 87 gm/kg/6W-I

TOXIC EFFECTS :: Blood - other changes

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 27(3),52,1983

RTECS	NM3259100
HS Code	2933990090

Precursor 10
482-89-3 56990-02-4 861608-81-3 612-42-0
861787-48-6 67-64-1 7791-25-5 7726-95-6
64-19-7 98-95-3
DownStream 3
54754-60-8 6417-56-7 6374-91-0

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

The content on this webpage is sourced from various professional data sources. If you have any questions or concerns regarding the content, please feel free to contact service1@chemsrc.com.