J acid synthesis

2synthesis methods

Product Name:J acid
CAS Number:87-02-5
Molecular formula:C10H9NO4S
Molecular Weight:239.25

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.

118-33-2
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$23.00/1g

87-02-5
347 suppliers
$29.00/25g

Yield:-

Reaction Conditions:

durch Alkalischmelze;

References:

Fierz-David,H. E.;Blangey,L. [Grundlegende Operationen der Farbenchemie, 5. Aufl. , S. 195, 198]

86-66-8
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87-02-5
347 suppliers
$29.00/25g

References

J acid Related Search:

5,5'-Dihydroxy-2,2'-dinaphthylamine-7,7'-disulphonic acid Glycine 4-Amino-benzenesulfonic acid monosodium salt Folic acid Citric acid Ethyl 2-(Chlorosulfonyl)acetate 2-Naphthol Sulfamic acid Naphthalene 1-Naphthol