Appearance:

yellow crystalline solid

Mass spec M+ increment:

358.0

Molecular weight:

473.39

Molecular formula:

C₂₅NO₉H₁₅

IUPAC name:

(2,5-dioxopyrrolidin-1-yl) 3',6'-dihydroxy-1-oxospiro[2-benzofuran-3,9'-xanthene]-5-carboxylate

Solubility:

good in DMF, DMSO

Quality control:

NMR ¹H, HPLC-MS (95%)

Storage conditions:

Storage: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate.

Excitation maximum, nm:

494

ε, L⋅mol⁻¹⋅cm⁻¹:

75000

Emission maximum, nm:

520

Fluorescence quantum yield:

0.9

CF₂₆₀:

0.20

CF₂₈₀:

0.17