Pharmaceutical Reference Materials, QC Reference Materials - Chemistry Naproxen Sodium Part # PH2312 USP Traceable QC Reference Material Naproxen Sodium CAS No. 26159-34-2. read more This product is available for purchase on our new website at zeptometrix.com. Order online today or call our team at +1.800.274.5487. Catalog Number: N/A Tags: pharmaceutical standard, USP tag Size 1 gram Analyte COA's MSDS/SDS Analyte Salicylic Acid CAS #69-72-7 COA's MSDS/SDS Related products Quick View Add to cart Compare Pharmaceutical Reference Materials Fructose Part # PH412 Quick View Choose Options Compare Environmental Reference Materials B. Subtilis Snap-Stick™ #SS-6633 Quick View Choose Options Compare Environmental Reference Materials S. aureus Snap-Stick™ #SS-6538 Quick View Add to cart Compare Pharmaceutical Reference Materials B. subtilis #61-0003