Nitrite Test Kit

Chemicals Direct’s nitrite test kit uses ceric sulfate as sodium nitrate indicator. It is a yellow to yellow-orange compound that can either be in anhydrous salt or hydrated form. Ceric sulfate is miscible in water and acids. It forms elemental chlorine slowly if added to dilute hydrochloric acid. However, it reacts faster with stronger reducing agents.

Ceric sulfate is a strong oxidizer, especially in acidic conditions. Its neutral solution slowly decomposes and deposits the light yellow oxide CeO2. When its tetrahydrate form is heated to 180-200°C, it will lose its water content. In  analytical chemistry, ceric sulfate is used for redox titration, often with a redox indicator.

Properties:

CAS: 13590-82-4
Molecular formula: Ce(SO4)2
Molar mass: 332.24 g/mol (anhydrous); 404.304 g/mol (tetrahydrate)
Density: 3.91 g/cm3 (tetrahydrate)
Melting point: 350°C (decomposition)
Boiling point: NA
Crystal structure: orthorhombic

Safety:

Handling: Avoid breathing its particles, vapor, or mist. Avoid skin and eye contact as well. Do not place near flammable sources. Vacuum or sweep small spills and dispose properly.

Storage: Store in a tightly closed container and in a cool, dry place.
Incompatible sources: reducing agents, strong oxidizing agents

Nitrate test kit includes:

1- #R8433Q-50 NT-2NA ceric sulfate titrating solution
1- #129-50 nitrite indicator
1- #407 test vial, glass w/cap, and a 5-cc syringe
1- #84040 plastic test kit box with foam insert

References:

http://en.wikipedia.org/wiki/Ceric_sulfate

http://ull.chemistry.uakron.edu/erd/Chemicals/8000/6251.html