Establishments primarily engaged in manufacturing phosphatic fertilizer materials, or mixed fertilizers from phosphatic materials produced in the same establishment. Included are phosphoric acid; normal, enriched, and concentrated super-phosphates; ammonium phosphates; nitro-phosphates; and calcium meta-phosphates. …
Examples: Ammonium phosphates, Calcium meta-phosphates, Defluorinated phosphates, Diammonium phosphates, Fertilizers, mixed: made