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Peri acid

CAS No.82-75-7
Chemical Name:Peri acid
CBNumber:CB0680336
Molecular Formula:C10H9NO3S
Formula Weight:223.25
MOL File:82-75-7.mol

Peri acid Property

Melting point >350°C
Boiling point 220°C (rough estimate)
Density 1.3588 (rough estimate)
refractive index 1.6500 (estimate)
pka pK1: 5.03 (25°C)
form powder to crystal
color Light yellow to Brown
Water Solubility 0.2g/L(21 ºC)
Merck 14,6405
BRN 983230
CAS DataBase Reference 82-75-7(CAS DataBase Reference)
FDA UNII 0D93Y3MXV4
EPA Substance Registry System 1-Naphthalenesulfonic acid, 8-amino- (82-75-7)

Safety

Hazard Codes :C
Risk Statements :34
Safety Statements :26-27-36-45
TSCA :Yes
HS Code :29214500

NFPA 704:

	0
1		0

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordWarning
Hazard statements H335-H315-H319
Precautionary statements P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P261-P280a-P304+P340-P305+P351+P338-P405-P501a

Peri acid Price More Price(5)

Brand: TCI Chemicals (India)
Product number: A0350
Product name : 8-Amino-1-naphthalenesulfonic Acid
Purity:
Packaging: 25G
Price: ₹2700
Updated: 2022/05/26
Buy: Buy

Brand: ALFA India
Product number: ALF-L17616-36
Product name : 8-Aminonaphthalene-1-sulfonic acid, 98%
Purity:
Packaging: 500g
Price: ₹26000
Updated: 2022/05/26
Buy: Buy

Brand: TCI Chemicals (India)
Product number: A0350
Product name : 8-Amino-1-naphthalenesulfonic Acid
Purity:
Packaging: 100G
Price: ₹5200
Updated: 2022/05/26
Buy: Buy

Brand: ALFA India
Product number: ALF-L17616-22
Product name : 8-Aminonaphthalene-1-sulfonic acid, 98%
Purity:
Packaging: 100g
Price: ₹7314
Updated: 2022/05/26
Buy: Buy

Brand: ALFA India
Product number: ALF-L17616-14
Product name : 8-Aminonaphthalene-1-sulfonic acid, 98%
Purity:
Packaging: 25g
Price: ₹2700
Updated: 2022/05/26
Buy: Buy

Peri acid Chemical Properties,Usage,Production

Chemical Properties Dark green powder. 1-Aminonaphthalene-8-sulfonic acid [82- 75-7]. (8-aminonaphthalene-1-sulfonic acid), Peri acid, C10H9NO3S, Mr 223.24, crystallizes as the monohydrate and is sparingly soluble even in boiling water. The sodium salt is also sparingly soluble in water. Caustic fusion at 200℃ produces 8-amino-1- naphthol, whereas slow hydrolysis with 10 % sodium hydroxide at 220 – 260℃ yields 1,8- dihydroxynaphthalene. Sulfonation with cold 10 % oleum produces 1-aminonaphthalene-4,8- disulfonic acid, whereas hot concentrated sulfuric acid results in slow isomerization into naphthionic acid.
Uses Intermediate of dyestuff. Dehydration with phosphorus oxychloride yields naphthosultam, and diazotization followed by hydrolysis results in naphthosultone, the intermediate for 1- hydroxynaphthalene-8-sulfonic acid. Diazotization followed by a Sandmeyer cyanide reaction gives 8-cyanonaphthalene-1-sulfonic acid, one of the most industrially important Sandmeyer reaction products because the nitrile forms the lactam, naphthostyril [130-00-7], upon treatment with concentrated alkali at 185℃. Hydrolysis of naphthostyril with dilute alkali yields 8-aminonaphthalene-1-carboxylic acid, which is the key intermediate for production of anthanthrone vat dyes via 1,10 -binaphthyl8,80 -dicarboxylic acid.
Production Methods Naphthalene is converted to naphthalene-1-sulfonic acid. The crude sulfonation product is diluted with sulfuric acid, and 67.5 % nitric acid is added slowly at 30℃ to give the 5- and 8-nitro derivatives. The products are converted to the readily soluble magnesium salts by addition of a slurry of dolomite. The reaction mixture is neutralized with chalk and filtered hot. The filtrate is run into a suspension of iron powder in boiling water, which is kept slightly acidic with sulfuric acid. When reduction is complete, dissolved iron is precipitated by addition of magnesia, the iron residues are filtered off while hot, and the resulting liquor is acidified to pH 4.5 with sulfuric acid to give 99 % pure Peri acid in 48 % yield. The filtrates are further acidified to precipitate crude Laurent’s acid. This may be purified via its magnesium salt to give a 17 % yield of pure 1,5-isomer.

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