USP标准物质在全球130多个国家得到广泛的认可和信任。USP法定标准物质是原料药、辅料、杂质、降解产品、食品补充剂、药典试剂和性能校正剂的样本，在进行法定 USP-NF 测试和化验时必须使用USP 标准物质。
USP标准物质也可以用作校正剂，用于溶出、粒子计数、熔点和滴定液标定，也可以用于空白和对照实验。标准物质主要用于色谱和光谱方法。除基于USP-NF的标准物质之外，USP 还向分析、临床、制药和研究实验室提供《食品化学法典》中规定的标准物质以及纯品。
1,134,288 " "Citalopram Related Compound E (25 mg)
"1,134,299 " "Citalopram Related Compound F (200 mg)[55011-89-7]
"1,134,197 " "Citalopram Related Compound G (25 mg)
"1,134,222 " "Citalopram Related Compound H (25 mg) [479065-02-6]
"1,134,368 " Citric Acid (200 mg) [77-92-9]
"1,134,200 " Cladribine (200 mg) [4291-63-8]
"1,134,211 " Cladribine Related Compound A (20 mg) [24757-70-8]
"1,134,379 " Clarithromycin (75 mg) [81103-11-9]
"1,134,390 " Clarithromycin Identity (100 mg) [81103-11-9]
"1,134,380 " "Clarithromycin Related Compound A (50 mg) n/f
"1,134,404 " Clavam-2-carboxylate Potassium (4 ug) n/f
"1,134,426 " Clavulanate Lithium (200 mg) n/f
"1,134,506 " Clemastine Fumarate (250 mg) [14976-57-9]
"1,135,000 " Clidinium Bromide (2 g) [3485-62-9]
"1,135,021 " "Clidinium Bromide Related Compound A(250 mg) [76201-95-1]
"1,135,600 " Climbazole (400 mg) [38083-17-9]
"1,136,002 " Clindamycin Hydrochloride (200 mg) [58207-19-5]
"1,137,005 " Clindamycin Palmitate Hydrochloride (500 mg) [25507-04-4]
"1,138,008 " Clindamycin Phosphate (125 mg) [24729-96-2]
"1,138,201 " Clioquinol (500 mg) [130-26-7]
"1,138,405 " Clobetasol Propionate (200 mg) [25122-46-7]
"1,138,427 " "Clobetasol Propionate Related Compound A(50 mg)
"1,138,507 " Clocortolone Pivalate (200 mg) [34097-16-0]
"1,138,904 " Clofazimine (200 mg) [2030-63-9]
"1,139,000 " Clo?brate (1 g) [637-07-0]
"1,140,000 " Clomiphene Citrate (500 mg) [50-41-9]
"1,140,101 " "Clomiphene Related Compound A (100 mg)
