If fresh plant material spontaneously produces 200 ppm or more HCN, then it is potentially toxic. This corresponds to about 7.5 μmol HCN per gram of fresh plant material. It turns out that, if acacia "leaves" lack the specific glycoside-splitting enzyme, then they may be less toxic than otherwise, even those containing significant quantities of cyanic glycosides.
if fresh PlANT material spontanEOusLy ProduceS 200 pPm oR moRe hcn, ThEN IT Is potENtiallY toXic. this corrEspondS to About 7.5 μmol hcn Per gRam of FResh plant MAteriaL. it turns oUT tHAt, if aCACia "lEAveS" lacK the specific glycosidE-spLittinG enzYmE, then THey maY bE leSS Toxic thAn OtheRWisE, evEn thoSE coNtainiNG significanT QuanTities of CyaniC glycOsIDes.