Robuta

https://www.sigmaaldrich.com/MX/es/product/sial/phr1101
L-Lysine monohydrochloride Pharmaceutical Secondary Standard; Certified Reference Material; CAS Number: 657-27-2; EC Number: 211-519-9; Synonyms:...
certified reference materialsecondary standardlysinepharmaceutical
https://www.sigmaaldrich.com/US/en/product/sial/phr1116
L-Menthol [CAS No. 2216-51-5], a flavor enhancer and local anesthetic, is available as a pharmaceutical secondary standard and certified reference material for...
certified reference materialsecondary standardmentholpharmaceutical
https://www.sigmaaldrich.com/US/en/product/sial/phr1803
Paclitaxel Pharmaceutical Secondary Standard; Certified Reference Material; CAS Number: 33069-62-4; Synonyms: Paclitaxel at Sigma-Aldrich
certified reference materialsecondary standardpaclitaxelpharmaceutical
https://www.sigmaaldrich.com/US/en/product/sial/phr3336
Polyethylene Glycol 300 certified reference material, pharmaceutical secondary standard; CAS Number: 25322-68-3; Synonyms: Poly(ethylene glycol),PEG; Linear...
polyethylene glycolsecondary standardpharmaceuticalcrm
https://www.sigmaaldrich.com/MX/es/product/sial/phr1330
Fosfato de potasio monobasic Pharmaceutical Secondary Standard; Certified Reference Material; CAS Number: 7778-77-0; EC Number: 231-913-4; Synonyms:...
certified reference materialsecondary standarddemonobasicpharmaceutical
https://www.nist.gov/publications/standard-reference-materials-calibration-nbs-secondary-standard-magnetic-tape-0
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