n,n-Dimethyl-p-phenylenediamine Sulfate Reagent

n,n-Dimethyl-p-phenylenediamine Sulfate, 97%
minimum assay


Warning
POISON. Harmful if inhaled. Use an exhaust hood.
IRRITANT. Avoid contact with eyes, skin, and clothing.
Wear impervious gloves when handling.

Caution
Observe safety precautions for handling concentrated acids.
Wear eye protection and impervious gloves. Use caution and
always add acid slowly to water. Corrosive to skin, metals,
and clothing. Avoid contact with liquid and vapor.

Preparation

1. Measure and pour into a 250 mL beaker 89 mL of
   distilled water. Stir on a magnetic stirrer.
2. Carefully add 15 mL of concentrated sulfuric acid.
   Reagent Preparation Procedures 4-13
3. Add and dissolve 1.0 g
   n,n-dimethyl-p-phenylenediamine sulfate.
4. Add 5 g of Florisil and stir the mixture until all on
   material is absorbed.
5. Allow the adsorbant to settle and decant the
   supernatant solution.