| Identification | More | [Name]
Peri acid | [CAS]
82-75-7 | [Synonyms]
1,8-AMINO ACID
1-AMINO-8-NAPHTHALENESULFONIC ACID
1-AMINO-8-SULFONAPHTHALENE
1-NAPHTHYLAMINE-8-SULFONIC ACID
8-AMINO-1-NAPHTHALENESULFONIC ACID
8-AMINONAPHTHALENE-1-SULFONIC ACID
8-AMINONAPHTHALENE-1-SULPHONIC ACID
8-SULFO-1-NAPHTHYLAMINE
ALPHA-NAPHTHYLAMINE-8-SULFONIC ACID
NAPHTHYLAMINOMONOSULFONIC ACID
PERI ACID
8-amino-1-naphthalenesulfonicaci
8-Naphthylamine-1-sulfonicacid
1-Amino-8-naphtalenesulfonic acid
1-Naphthylamine-8-sulphonic acid
8-amino-1-naphthalenesulfonic acid (peri acid)
1-Naphthalenesulfonic acid, 8-amino-
8-Naphthol-1-sulfonic acid
1,8-Naphthylaminesulfonic acid
1-Aminonaphthalene-8-sulfonic acid | [EINECS(EC#)]
201-437-1 | [Molecular Formula]
C10H9NO3S | [MDL Number]
MFCD00035730 | [Molecular Weight]
223.25 | [MOL File]
82-75-7.mol |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R34:Causes burns. | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S27:Take off immediately all contaminated clothing .
S36:Wear suitable protective clothing .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . | [TSCA ]
Yes | [HS Code ]
29214500 |
| Hazard Information | Back Directory | [Chemical Properties]
Dark green powder | [Uses]
Intermediate of dyestuff | [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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