Urea (15N2) Product Catalog # Size Price (USD) Quantity Urea (15N2)291804-1G1 gPlease InquirePlease InquireUrea (15N2)291804-5G5 gPlease InquirePlease InquireUrea (15N2)291804-25G25 gPlease InquirePlease Inquire Description Labeled CAS #: 2067-80-3 Unlabeled CAS #: 57-13-6 Molecular Formula: CH4(15N)2O Molecular Weight: 62.0