The constituents slowly hydrate and the mineral hydrates solidify and harden. Chloral and chloral hydrate have the same properties biologically since the former hydrates rapidly. Strength forms by hydration to calcium aluminate hydrates. The soluble salts, such as nitrate, sulfate and acetate form hydrates upon crystallization. Lead styphnate is known in various polymorphs, hydrates, and basic salts. It is topologically equivalent to the empty structure of sII clathrate hydrates. Carbon is also found in methane hydrates in polar regions and under the seas. The anhydrous salt can be regenerated by heating the hydrates. Zinc chloride is the name of chemical compounds with the formula ZnCl and its hydrates. In aqueous solution, the molecule hydrates and cyclizes. The anhydrous compound can be prepared by heating the hydrates. After mixing, the cement hydrates and eventually hardens into a stone-like material. Water hydrates the grains and enables fermentation. As well as the anhydrous compound Co(NO), several hydrates of cobalt(II) nitrate exist. The regulation is inclusive of all chlorpyrifos isomers and hydrates in any solution or mixture.