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Ammonia as Nitrogen. ALS Environmental may or may not test for Ammonia as Nitrogen (CAS # 7664-41-7). Information is subject to change; please contact us for the latest available analytes for which we test.
Chemical Abstracts Service (CAS) Registry Number: 7631-86-9 (Silica, Amorphous); 7699-41-4 (Silica, Gel); 60676-86-0 (Vitreous silica); 61790-53-2 (Diatomaceous earth (uncalcined)); 68855-54-9 (Flux-calcined diatomaceous earth); 112926-00-8 (Precipitated silica; silica gel); 112945-52-5 (Pyrogenic (fumed) amorphous silica)