Streptomycin Sulfate Technical (CAS No. 3810-74-0), imported in bulk form. The subject product, Streptomycin Sulfate Technical, is the sesquisulfate salt of Streptomycin, an antibiotic produced by the soil Actinomycete Streptomyces griseus. You indicate in your letter that, subsequent to importation, your client intends to formulate the subject product with inert ingredients for use as an antimicrobial pesticide to control a number of commercially important bacterial plant pathogens.
[1] Please importantly note that only the relevant portion of the related is displayed above. You may refer to the said customs ruling for the entire ruling explanation.
[1]. https://rulings.cbp.gov/ruling/E80553