Chromic Fluoride Tetrahydrate
Chromic fluoride tetrahydrate
Disodium Octaborate Tetrahydrate
Disodium octaborate tetrahydrate is a white, odorless, powdered chemical substance that is not flammable, combustible, or explosive and has low acute oral and dermal toxicity. It is used as an insecticide and fungicide, and is commonly sold as an insecticide as "Tim-Bor", or "termite prufe" brands in the United States. It is also a flame-retardant
Iron Fluoride Tetrahydrate
Iron(ii) fluoride has formula fef2 and can be encountered as the anhydrous form or as the tetrahydrate, fef2. 4h2o, (cas number 13940-89-1). The anhydrous salt can be made from the elements.  fef2 has the tio2 rutile structure where the iron atoms are octahedrally coordinated and the fluoride ions three coordinate. . Fef2 is soluble in water from which the tetrahydrate can be formed. 
Magnesium Salicylate Tetrahydrate
Magnesium salicylate is a common analgesic and non-steroidal anti-inflammatory drug (NSAID) used to treat mild to moderate muscular pain. It is also used to treat headaches, general back pain, and certain joint pains like arthritis.
Sodium Perborate Tetrahydrate
Sodium perborate (PBS) is a white, odorless, water-soluble chemical compound with chemical formula NaBO3. It crystallizes as the monohydrate, NaBO3·H2O, tetrahydrate, NaBO3·4H2O and trihydrate, NaBO3·3H2O. The monohydrate and tetrahydrate are the commercially important forms.