... of nm - several µm, excellent solubility in water and DMF, etc, metallic content < 10ppm, not soluble impurities < 0 ... of nm - several µm, excellent solubility in water and DMF,etc. Metallic content <10ppm, not soluble impurities < 0.01percent ... solid powder, > 99% purity, good electrical conductivity, excellent solubility in DMF, chlorobenzene, etc , metallic content < 10 PPM, insoluble impurities < ...