1-Naphthol-4-sulfonic acid [ 84-87-7 ]

Specification: conventional index name
-grade product
qualified

appearance
White to light gray powder solid
White to light gray paste solid

Water dissolves state of
Clear and transparent to almost clear and transparent

On the hydrochloric acid dissolution state
Clear and transparent to almost clear and transparent

1 - alpha-naphthol - 4 - sulfonic acid content
(acid to plan) % p
80
70

Moisture % acuities
3
3

Water insoluble, % acuities
0.1
0.1

1 - naphthalene acid amine - 4
By 100% 1 - alpha-naphthol - 4 - sulfonic acid plan % acuities
0
0

So2 % acuities
0
0

Iron ion acuities (mg/kg)
100
100