amino-R acid
amino-R acid Basic information
- Product Name:
- amino-R acid
- Synonyms:
-
- 3-aminonaphthalene-2,7-disulphonic acid
- amino-R acid
- 3-aminonaphthalene-2,7-disulfonic acid
- Amido R acid
- 2,7-Naphthalenedisulfonic acid, 3-amino-
- 3-azanylnaphthalene-2,7-disulfonic acid
- 2-Aminonaphthalene-3,6-disulfonic acid
- 2-amino-3,6-naphthalenedisulphonic acid
- CAS:
- 92-28-4
- MF:
- C10H9NO6S2
- MW:
- 303.31
- EINECS:
- 202-143-6
- Mol File:
- 92-28-4.mol
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amino-R acid Chemical Properties
- Density
- 1.769±0.06 g/cm3(Predicted)
- pka
- -0.93±0.40(Predicted)
- EPA Substance Registry System
- 2,7-Naphthalenedisulfonic acid, 3-amino- (92-28-4)
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amino-R acid Usage And Synthesis
Uses
Amino R acid is used mainly as an intermediate for conversion to 2-amino-3-hydroxynaphthalene-6-sulfonic acid by caustic fusion at 250℃.
Uses
Manufacture of dyes.
Production Methods
The sodium salt of 2-hydroxynaphthalene-3,6-disulfonic acid is aminated by heating with ammonia and ammonium bisulfite for 24 h at 160℃. The charge is added to excess lime and heated to remove excess ammonia, and calcium sulfite is filtered off. The productis precipitated by acidification ofthe filtrate and purified by redissolving the paste in alkali and reprecipitating with acid. The yield is 90 %.
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amino-R acid(92-28-4)Related Product Information
- Mordant Blue 13
- Acid Black 1
- SPADNS
- NITRO RED
- Trypan Blue
- REACTIVE RED 4
- ACID RED 1
- ACID RED 8
- ARSENAZO I
- ACID BLUE 29
- CHROMOTROPE 2B
- ACID RED 106
- ARSENAZO III DISODIUM SALT
- ACID VIOLET 5
- ACID VIOLET 7
- CHROMOTROPE 2R
- SULFONAZO III, TITRATION INDICATOR FOR S O4
- 3-AMINO-2,7-NAPHTHALENEDISULFONIC ACID MONOSODIUM SALT