Table 1.
Some examples of reference data for hydrates of organic compounds.
| Compound | CAS No. (Anhydrous Form) |
CAS No. (Hydrate) |
Composition and Properties * (if Known) |
|---|---|---|---|
| Unstable hydrates | |||
| Methanol | 67-56-1 | 118240-86-1 151900-28-5 |
1:1 |
| Acetonitrile | 75-05-8 | 128870-13-3 | 1:1 |
| Acetic acid | 64-19-7 | 19215-29-3 99294-94-7 |
1:1, 1:2 |
| Anthracene | 120-12-7 | 188974-01-8 | 1:1 |
| Stable noncovalent hydrates | |||
| Ethylene diamine | 107-15-3 | 6780-13-8 | 1:1; Tb 118; nD20 1.448-1.451; d420 0.96 |
| Citric acid | 77-92-9 | 5949-29-1 | 1:1 ** |
| Caffeine | 58-08-2 | 5743-12-4 | 1:1 ** |
| Benzene-1,2,3-tricarboxylic (hemimellitic) acid |
569-51-7 | 732304-21-1 (mono); 36362-97-7 (di) |
1:1; Tm 190-192 |
(*) Abbreviations: Tb—normal boiling point, Tm—melting point, nD20—index of refraction, d420—relative density; (**) hydrates decompose below the melting point.