Patent ID: 8293793

Claim:
A propionic acid-comprising composition in solid and essentially pure form, comprising at least one compound according to formula (I) (M n+ )(H + ) x (CH 3 CH 2 C(O)O − ) (n+x ) (I) wherein M n+ is sodium; n is 1; and x is a number in the range from 1.8 to 2.2; or [NaH 2 (CH 3 CH 2 C(O)O) 3 ]; or [NaH 1,3 (CH 3 CH 2 C(O)O 2,3 )]; and wherein said composition exhibits powder X-ray diffractogram diffraction peaks at 4or more of the following lattice spacings d: 13.63; 13.13; 13.03; 11.09; 9.71; 9.59; 3.94; 2.84; 2.79 [Å] (±0.04 [Å]).