1-Naphthol-4-sulfonic acid

外观:

白色或浅灰白色粉末或膏状固体，易溶于水、甲醇、乙醇等。

1-萘酚-4-磺酸含量(以酸计)%≥70%

水分 ≤3%

水不溶物 ≤0.1%

1-萘胺-4-磺酸(以100%1-萘酚-4-磺酸计)%≤

二氧化硫 %≤0

铁离子≤(mg/kg) 100

用途:

偶氮染料中间体，用于食用色素和制造直接铜蓝BR和2R，酸性红B和酸性媒介枣红B等染料的原料中间体。

Appearance:

White or light grayish white powder or paste solid, easily soluble in water, methanol, ethanol, etc.

1-naphthol-4-sulfonic acid content (based on acid)% ≥ 70%

Moisture ≤ 3%

Water insoluble matter ≤ 0.1%

1-naphthylamine-4-sulfonic acid (based on 100% 1-naphthol-4-sulfonic acid)% ≤

Sulfur dioxide% ≤ 0

Iron ion ≤ (mg / kg) 100

Application:

Azo dye intermediate, used for food pigment and raw material intermediate of producing direct copper blue BR and 2R, acid red B and acid mordant jujube red B.