Stable Isotope Labelled Internal Standards

N‑EtFOSAA (N‑ethyl perfluorooctane sulfonamidoacetic acid) (𝑁-ethyl-D₅, 98%)

CAS: 1265205-97-7

Product No.: C-013

Isotopic Enrichment: >98% D₅

N‑MeFOSAA (N‑methyl perfluorooctane sulfonamidoacetic acid) (𝑁-methyl-D₃, 98%)

CAS: 1400690-70-1

Product No.: C-012

Isotopic Enrichment: >98% D₃

Citric acid-2,2,4,4-d₄

CAS: 147664-83-3

Product No.: D-025

Purity: 98%

Isotopic Enrichment: 98% D4

DL-Lactate-2,3,3,3-d4 (powder)

CAS: 344299-52-1

Product No.: D-018

Purity: 97%

Isotopic Enrichment: 98%