Thiourea (CAS no.: 62-56-6)
Properties:
1) Appearance: white crystals
2) Bitter taste
3) Soluble in water and alcohol

Phosphorous acid (CAS no.: 10294-56-1)
Properties:
1) Appearance: colorless or light yellow crystals
2) Specific gravity: 1.651
3) Melting point: 73.6oC
4) Boiling point: 200oC
5) Soluble in water, easily soluble in alcohol
6) Stability:
a) Will gradually oxidize to phosphoric acid
b) When heated to over 180oC, it will decompose to phosphoric
acid and hydrogen phosphate

Thiourea dioxide (CAS no.: 4189-44-0/1758-73-2)
Properties:
1) Appearance: loose white crystallized powder

Packing:
Thiourea: 25kg/plastic woven bag lined with PE bag; 50kg/cardboard drum
Phosphorous acid: 25kg/plastic woven bag
Thiourea dioxide: 25kg/plastic woven bag lined with PE bag;
50kg/cardboard drum

Storage note:
Phosphorous acid should be kept in a dry and well ventilated place.