J acid
- Product Name
- J acid
- CAS No.
- 87-02-5
- Chemical Name
- J acid
- Synonyms
- 6-Amino-1-naphthol-3-sulfonic Acid Hydrate;I-ACID;J ACID;kyselinai;Iso-γ acid;isogammaacid;aminonaphthol;87-02-5 J acid;J acid ISO 9001：2015 REACH;AMINO-NAPHTHOL SULFONIC ACID
- CBNumber
- CB5264771
- Molecular Formula
- C10H9NO4S
- Formula Weight
- 239.25
- MOL File
- 87-02-5.mol
J acid Property
- Density
- 1.4338 (rough estimate)
- vapor pressure
- 0Pa at 25℃
- refractive index
- 1.6500 (estimate)
- storage temp.
- Keep in dark place,Inert atmosphere,Room temperature
- solubility
- Slightly soluble in water
- pka
- -0.28±0.40(Predicted)
- form
- powder
- color
- yellow
- Water Solubility
- 5g/L at 20℃
- InChIKey
- KYARBIJYVGJZLB-UHFFFAOYSA-N
- LogP
- -1.39
- CAS DataBase Reference
- 87-02-5(CAS DataBase Reference)
- EPA Substance Registry System
- 7-Amino-4-hydroxy-2-naphthalenesulfonic acid (87-02-5)
Safety
- Hazard Codes
- C
- Risk Statements
- 34
- Safety Statements
- 26-27-36/37/39
- RIDADR
- UN 2585 8/PG 3
- WGK Germany
- 1
- RTECS
- QK1295500
- F
- 21
- HazardClass
- 8
- PackingGroup
- III
- HS Code
- 2922190090
- Toxicity
- LD50 oral in rat: 11500mg/kg
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H320Causes eye irritation
H341Suspected of causing genetic defects
- Precautionary statements
-
P201Obtain special instructions before use.
P202Do not handle until all safety precautions have been read and understood.
P264Wash hands thoroughly after handling.
P264Wash skin thouroughly after handling.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P308+P313IF exposed or concerned: Get medical advice/attention.
P405Store locked up.
P501Dispose of contents/container to..…
N-Bromosuccinimide Price
- Product number
- 08800
- Product name
- 7-Amino-4-hydroxy-2-naphthalenesulfonic acid
- Purity
- technical, ≥90% (T)
- Packaging
- 100G
- Price
- $102.6
- Updated
- 2024/03/01
- Product number
- A0370
- Product name
- 6-Amino-1-naphthol-3-sulfonic Acid Hydrate
- Purity
- >95.0%(HPLC)(T)
- Packaging
- 25g
- Price
- $30
- Updated
- 2024/03/01
- Product number
- A0370
- Product name
- 6-Amino-1-naphthol-3-sulfonic Acid Hydrate
- Purity
- >95.0%(HPLC)(T)
- Packaging
- 500g
- Price
- $231
- Updated
- 2024/03/01
- Product number
- 415295
- Product name
- 2-Amino-5-naphthol-7-sulfonic Acid
- Packaging
- 5g
- Price
- $305
- Updated
- 2021/12/16
- Product number
- A618693
- Product name
- 2-Amino-5-naphthol-7-sulfonicAcid
- Packaging
- 25g
- Price
- $70
- Updated
- 2021/12/16
J acid Chemical Properties,Usage,Production
Chemical Properties
Gray needles, white when pure. Soluble in hot water; sparingly soluble in cold water. 2-Amino-5-hydroxynaphthalene-7-sulfonic acid [87-02-5]. (7-amino-4-hydroxynaphthalene-2-sulfonic acid), J acid, C10H9NO4S, Mr 239.2, is only slightly soluble (0.1 %) in cold water but readily soluble at 100℃. The alkalimetal salts are readily soluble in water. Diazo compounds are normally coupled with J acid under alkaline conditions with reaction in the 6-position (ortho to hydroxyl); however, under acid conditions, coupling can occur in the 1- position. Reaction with bisulfite gives 4,7-dihydroxynaphthalene-2-sulfonic acid. The N-acylation, Nalkylation, and N-arylation reactions are important.
Uses
Azo dye intermediate.
Production Methods
A concentrated disodium salt solution of 2-aminonaphthalene-5,7-disulfonic acid is added to 72 % sodium hydroxide at 150 ℃. After heating to 187℃ over 10 h reaction is continued at this temperature for a further 8 h until completion of the reaction is indicated by giving equivalent diazotization and coupling titers for a worked-up sample. Quenching, acidification, purging of sulfur dioxide, and filtration at 55 ℃ followed by washing with water at 50℃ result in an 88 % yield of paste. Purification by salting out the sodium salt from a hot alkaline solution gives a 90 % recovery of the product as gray crystals. An improved process with 90 % yield is claimed by feeding the concentrated 2-aminonaphthalene-5,7-disulfonic acid liquor and the caustic liquor simultaneously into the fusion reactor to maintain more stable conditions.
Definition
ChEBI: 7-amino-4-hydroxy-2-naphthalenesulfonic acid is an aminonaphthalenesulfonic acid that is 2-naphthalenesulfonic acid substituted by an amino group at position 7 and a hydroxy group at position 4 respectively. It has a role as a metabolite. It is an aminonaphthalenesulfonic acid and a member of naphthols.
Flammability and Explosibility
Not classified
J acid Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from J acid manufacturers
- Product
- J acid 87-02-5
- Price
- US $1.00/KG
- Min. Order
- 1KG
- Purity
- 97%
- Supply Ability
- 1000KG/month
- Release date
- 2021-06-16
- Product
- J acid 87-02-5
- Price
- US $10.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 10 mt
- Release date
- 2024-11-18
- Product
- J acid 87-02-5
- Price
- US $11.60/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 5000kg
- Release date
- 2024-08-21