Naphthionic acid
- Product Name
- Naphthionic acid
- CAS No.
- 84-86-6
- Chemical Name
- Naphthionic acid
- Synonyms
- usafm-5;USAF m-5;PIRIA'S ACID;PARIA'S ACID;naphthionicaci;NAPHTHIONIC ACID;P-NAPHTHIONIC ACID;kyselinanafthionova;1,4-naphthionicacid;Kyselina nafthionova
- CBNumber
- CB6130464
- Molecular Formula
- C10H9NO3S
- Formula Weight
- 223.25
- MOL File
- 84-86-6.mol
Naphthionic acid Property
- Melting point:
- ≥300 °C(lit.)
- Boiling point:
- 220°C (rough estimate)
- Density
- 1.67
- refractive index
- 1.5250 (estimate)
- storage temp.
- Store below +30°C.
- solubility
- Sparingly soluble in dichloromethane. Soluble in aqueous base.
- pka
- pK1: 2.81 (25°C)
- form
- powder to crystal
- color
- White to Light yellow to Light red
- Water Solubility
- 309.9mg/L(20 ºC)
- Merck
- 14,6403
- BRN
- 1971299
- CAS DataBase Reference
- 84-86-6(CAS DataBase Reference)
- NIST Chemistry Reference
- 4-Amino-1-naphthalene sulfonic acid(84-86-6)
- EPA Substance Registry System
- 4-Amino-1-naphthalenesulfonic acid (84-86-6)
Safety
- Hazard Codes
- C
- Risk Statements
- 34-22
- Safety Statements
- 26-36/37/39-45-25
- RIDADR
- UN 2585 8/PG 3
- WGK Germany
- 3
- RTECS
- QK1270000
- TSCA
- Yes
- HazardClass
- 8
- PackingGroup
- III
- HS Code
- 29214500
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H314Causes severe skin burns and eye damage
- Precautionary statements
-
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- 250619
- Product name
- 4-Amino-1-naphthalenesulfonic acid
- Purity
- 97%
- Packaging
- 25g
- Price
- $123
- Updated
- 2024/03/01
- Product number
- A0344
- Product name
- 4-Amino-1-naphthalenesulfonic Acid
- Purity
- >98.0%(HPLC)
- Packaging
- 25g
- Price
- $89
- Updated
- 2024/03/01
- Product number
- B21829
- Product name
- 4-Aminonaphthalene-1-sulfonic acid, 98%
- Packaging
- 25g
- Price
- $80.8
- Updated
- 2021/12/16
- Product number
- A618335
- Product name
- 4-Amino-1-naphthalenesulfonic acid
- Packaging
- 5g
- Price
- $105
- Updated
- 2021/12/16
- Product number
- 5846AF
- Product name
- Naphthionicacid
- Packaging
- 1g
- Price
- $29
- Updated
- 2021/12/16
Naphthionic acid Chemical Properties,Usage,Production
Chemical Properties
?slightly greyish to beige powder and granules. 1-Aminonaphthalene- 4 -sulfonic acid [84- 86-6]. (4-aminonaphthalene-1-sulfonic acid), naphthionic acid, Piria’s acid, C10H9NO3S, Mr 223.24, is sparingly soluble in water (0.25 % at 100℃), but the sodium, potassium, calcium, and barium salts are all readily soluble. Chlorination of 1-Aminonaphthalene- 4 -sulfonic acid with copper(II) chloride produces 4-chloro-1-aminonaphthalene, whereas the action of chlorine on an aqueous sulfuric acid solution gives 2,3-dichloro-1,4-naphthoquinone. High-temperature bromination gives 2,4- dibromo-1-aminonaphthalene, whereas vigorous nitration yields 2,4-dinitro-1-hydroxynaphthalene. Sulfonation with 25 % oleum gives 1-aminonaphthalene-4,6- and 4,7-disulfonic acids, whereas prolonged heating with sulfuric acid at 130℃ leads to 1-aminonaphthalene-5- and 6- sulfonic acids. Hydrolysis of the 1-amino group to give 1-hydroxynaphthalene-4-sulfonic acid is best achieved by a reverse-Bucherer reaction but also results from prolonged heating with 50 % sodium hydroxide.
Uses
4-Amino-1-naphthalenesulfonic acid has potent therapeutic applications. Its sodium salt has been used as non-toxic hemostatic. It is also a metabolite of azo dyes.
Uses
Intermediate for azo dyes, e.g., Congo red. Naphthionic acid is used as an intermediate in the production of 1-hydroxynaphthalene-4-sulfonic acid, 1-aminonaphthalene-2-sulfonic acid, and 1-aminonaphthalene-4,6- and 4,7-disulfonic acids. Use as a diazo component has been previously described, e.g., C.I. Food Red 3, C.I. Food Red 7, C.I. Food Red 9, and C.I. Acid Red 25.
Definition
ChEBI: Naphthionic acid is an aminonaphthalenesulfonic acid.
Production Methods
Naphthionic acid was first prepared by PIRIA by heating 1-nitronaphthalene with ammonium sulfite; however, the formation of 1-aminonaphthalene-2,4-disulfonic acid and other byproducts makes this route unattractive for large-scale production. Although it can also be prepared by direct sulfonation of 1-naphthylamine, it is more conveniently produced by a solvent-bake process. 1-Naphthylamine is dissolved in o-dichlorobenzene and H2SO4 (molar ratio 1 : 1) added to form a suspension of the sulfate. After being heated gradually to 180℃, the reaction is completed by maintaining this temperature until all the water of reaction has been distilled off with solvent recycle. The product is extracted from the final mixture by addition to aqueous sodium carbonate solution. After separation, the aqueous layer is steam distilled to remove residual solvent, and the product is salted out, filtered, and washed with brine to give sodium naphthionate as a paste in 90 % yield.
General Description
4-Amino-1-naphthalenesulfonic acid is a diazo compound. It is also known as Piria′s acid.
Purification Methods
It crystallises from H2O as needles of the 0.5 hydrate. Salt solutions fluoresce strongly blue. The S-benzylisothiuronium salt has m 195o (from aqueous EtOH). [Beilstein 14 IV 2793.]
Naphthionic acid Preparation Products And Raw materials
Raw materials
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View Lastest Price from Naphthionic acid manufacturers
- Product
- Naphthionic acid 84-86-6
- Price
- US $0.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 50000KG/month
- Release date
- 2023-08-18
- Product
- Naphthionic acid 84-86-6
- Price
- US $10.00/KG
- Min. Order
- 100KG
- Purity
- 99%
- Supply Ability
- 100 mt
- Release date
- 2021-08-25
- Product
- 4-Amino-1-naphthalenesulfonic Acid 84-86-6
- Price
- US $0.00-0.00/KG
- Min. Order
- 1KG
- Purity
- 99.0%+
- Supply Ability
- 100 tons
- Release date
- 2019-12-30