Leading Manufacturer for 217-210-5 - J acid ( 2-Amino-5-naphthol-7-sulfonic Acid ) CAS 87-02-5 EINECS No.: 201-718-9 best top 1 factory lowest price – Mit-ivy
Leading Manufacturer for 217-210-5 - J acid ( 2-Amino-5-naphthol-7-sulfonic Acid ) CAS 87-02-5 EINECS No.: 201-718-9 best top 1 factory lowest price – Mit-ivy Detail:
J acid Typical Properties
| Items | Specifications |
| Content | ≥90% |
| Gamma Acid | ≤0.15% |
| Insoluble | ≤0.20% |
| Items | Specification |
| Appearance | Grey to light brown powder |
| Content (dry) | ≥90.0% |
| Purity (HPLC) | ≥97.0% |
| Gamma Acid content | ≤1.50% |
| Bis J Acid content | ≤0.20% |
| Water | ≤1.0% |
| 2-Naphthylamine | ≤100ppm |
Used to be made from β-naphthylamine. Because of the strong carcinogenicity of β-naphthylamine, this production method has been eliminated, and now 2-naphthylamine-1-sulfonic acid is used as raw material to produce J acid. After sulfonation and hydrolysis, 2-naphthalic acid-5-dimethyl 7-disulfonate monosodium salt (amino J acid) was obtained, which was then neutralized, fused by alkali and acidified. J acid was obtained by sulfonation with fuming sulfuric acid, hydrolysis, absorption, washing, alkali solution and acidizing washing. The sodium salt dissolves in water and shows blue fluorescence. It is co-heated with ferric trichloride solution to form brown-black precipitation.
Chemical property
1. J acid co-heated with ferric chloride solution to form dark brown precipitate; calcium chloride to form yellowish brown precipitate; base sodium salt dissolved in water showed blue fluorescence.
2. Avoid inhaling dust from this product and avoid contact with eyes and skin.
3. poisonous. Rats were given oral LD50:11500mg/kg. Toxic or strongly corrosive raw materials such as 2-aminonaphthalene sulfonic acid, fuming concentrated sulfuric acid and caustic soda are used in production.
Applications
Dye intermediates. It is mainly used to prepare direct green lotus R, direct fast blue FRL, direct fast ash 2BL, direct copper salt blue 2R, direct acid resistant purple, direct pink, direct copper dye navy, fast blue B2R, direct jujube GB, as well as reactive scarlet, orange, brilliant orange X-GN, gray, grass green, red brown and other dyes. It is also used to prepare double J acid, scarlet acid and phenyl J acid.
storage and packing
Packaging Details：25kg/bag
It should be sealed and protected from light. Store in a dry, clean house to prevent exposure to sunlight and rain. When placed, the mouth of the box (drum) should be upward to avoid leakage of the product.
others name:J acid；2-amino-5-naphthol-7-sulfonic acid; 6-amino-1-naphthol-3-sulfonic acid
Product detail pictures:
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We have advanced equipment. Our products are exported to the USA, the UK and so on, enjoying a good reputation among customers for Leading Manufacturer for 217-210-5 - J acid ( 2-Amino-5-naphthol-7-sulfonic Acid ) CAS 87-02-5 EINECS No.: 201-718-9 best top 1 factory lowest price – Mit-ivy , The product will supply to all over the world, such as: Mexico, European, Muscat, Each product is carefully made, it will make you satisfied. Our merchandise in the production process have got strictly monitored, because it is only to supply you the best quality, we'll feel confident. High production costs but low prices for our long-term cooperation. You can have a variety choices and the value of all types are same reliable. If you have any question, do not hesitate to ask us.
By Joanne from Swedish - 2018.12.10 19:03
The factory technical staff not only have high level of technology, their English level is also very good, this is a great help to technology communication.
By Abigail from California - 2017.01.28 19:59
