Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Direct Black 19
Price: Check
Purity: 98.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: Direct Black 19
Price: ￥108.0/100g ￥298.0/500g
Purity: 98.0%
Stocking Period: Inquiry
Contact: Liu jia
Email: 2130147988@qq.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: Direct Black 19
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

6428-31-5

6428-31-5 structure

6428-31-5 structure

Name: Direct Black 19
Chemical Name: Direct Black 19
CAS Number: 6428-31-5
Molecular Formula: C₃₄H₂₇N₁₃Na₂O₇S₂
Molecular Weight: 839.771
Catalog: Dyes and pigments dye Direct dye
Create Date: 2018-03-01 08:00:00
Modify Date: 2025-08-24 14:57:59

Name	Direct Black 19
Synonyms	Vicorect Black FB. EINECS 229-208-1 RIFAZOLBLACKGR Condires Black AN Benzo Fast Black G 2,7-Naphthalenedisulfonic acid, 4-amino-3,6-bis[(E)-2-[4-[(E)-2-(2,4-diaminophenyl)diazenyl]phenyl]diazenyl]-5-hydroxy-, sodium salt (1:2) Atul Direct Black VG Black G Sumilight Black G Disodium 4-amino-3,6-bis[(E)-{4-[(E)-(2,4-diaminophenyl)diazenyl]phenyl}diazenyl]-5-hydroxy-2,7-naphthalenedisulfonate Kayarus Black G

Density	1.727g/cm3
Molecular Formula	C₃₄H₂₇N₁₃Na₂O₇S₂
Molecular Weight	839.771
Exact Mass	839.139343
PSA	380.37000
LogP	12.99380
Index of Refraction	1.817

CHEMICAL IDENTIFICATION

RTECS NUMBER :: GD0175560

CHEMICAL NAME :: C.I. Direct Black 19, disodium salt

CAS REGISTRY NUMBER :: 6428-31-5

LAST UPDATED :: 199710

DATA ITEMS CITED :: 7

MOLECULAR FORMULA :: C34-H29-N13-O7-S2.2Na

MOLECULAR WEIGHT :: 841.86

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

MUTATION DATA

TYPE OF TEST :: Body fluid assay

TEST SYSTEM :: Rodent - rat Bacteria - Salmonella typhimurium

DOSE/DURATION :: 500 mg/kg

REFERENCE :: MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 156,131,1985 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - M4445 No. of Facilities: 66 (estimated) No. of Industries: 1 No. of Occupations: 5 No. of Employees: 780 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - M4445 No. of Facilities: 45 (estimated) No. of Industries: 3 No. of Occupations: 5 No. of Employees: 1157 (estimated) No. of Female Employees: 124 (estimated)

Hazard Codes	Xi
Risk Phrases	R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Phrases	S26-S37/39
WGK Germany	3
HS Code	3204140000

HS Code	3204140000

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