H-Pyr-OH Product Catalog # Size Price (USD) Quantity H-Pyr-OH181653-100G100 g$89.00 - H-Pyr-OH-100g quantity + H-Pyr-OH181653-500G500 g$142.00 - H-Pyr-OH-500g quantity + Add to cart Description Synonym: L-Pyroglutamic acid CAS #: 98-79-3 Molecular Formula: C5H7NO3 Molecular Weight: 129.1