6-Nitro-1-Diazo-2-Naphtol-4-Sulfonic Acid

Details:

Identification:
Product: 6-Nitro-1-Diazo-2-Naphtol-4-Sulfonic Acid
Synonym: 6-Nitro-1,2,4-Diazo Acid; 6-Nitro-1,2-diazoxynaphthalene-4-Sulfonic Acid
EC Name: 4-diazo-3,4-dihydro-7-nitro-3-oxonaphthalene-1-sulphonic acid
IUPAC Name: 4-diazo-7-nitro-3-oxo-3,4-dihydronaphthalene-1-sulfonic acid
CAS: 63589-25-3 (or 50412-00-5)
EINECS: 264-347-1  (or 256-582-3)
Molecular Formula: C₁₀H₅N₃O₆S (or C₁₀H₇N₃O₆S)
Formula Weight:  295.23
Category: Intermediates of Dyes and Pigments

Properties:
Appearance: Light yellow or brown crystalline.
Melting point: 230℃  start to decompose when heat to 203℃
Solubility: soluble in water easily

Specification:
Appearance: Light yellow or brown crystalline.
Purity (HPLC): 90.00% Min.
Assay: 78.00% Min.
Free acid: 5.00% Max.
Insolubles: 0.20% Max.

Isomers:
8-nitro-1.2.4-diazoxy naphthalene sulphonic acid content (calculated by HPLC): 4.0% Max.
6,8-nitro group-1.2.4-diazoxy naphthalene sulphonic acid (calculated by HPLC): 1.0% Max.
1,2,4-diazoxy naphthalene sulphonic acid (calculated by HPLC): 1.0% Max.

Applications:
Used in the production of acidic and neutral dyes, including Acidic Black 194, Acidic Black 172,
Neutral Black ACE, Acidic Black 107, Acidic Black 207, Acidic Black 52, Acidic Brown 355, Acidic Brown 348, etc.

Packing:
40kg woven bag with black inner PE bag   20.8mt per container max.
25kg woven bag with black inner PE bag   20.8mt per container max.
25kg cylindrical fiber drum with black inner PE bag   11.25mt per container max.
25kg square fiber drum with black inner PE bag        13.50mt per container max.

Dangerous classification:
Before European REACH: Class:4.1   UN No.: 2925  Packing group: II
Before European REACH: Class:4.1   UN No.: 3236  Packing group: II

Documents:
Typical CoA
MSDS/SDS(Material Safety Data Sheet): Simply Version         REACH Version