English to Spanish Medical Medical: Pharmaceuticals n/f

Buenos días,

Espero que puedan ayudarme con la siguiente abreviatura al español: “n/f”, relacionada con la prueba de un medicamento. No estoy seguro, lo he encontrado como “no establecido”, pero me queda la duda. Gracias:

“Physical and chemical properties: Propertiies as indicated on the MSDS are general and not necessarily specific to the USP References Standard Lot provided.

Appearance and Odor: Yellow powder
pH: n/f
Melting Range: 65º C, also reported as approximately 149%
Evaporation rate: n/f
Boiling point: n/f”

GVL