4-Hydroxybenzhydrazide

Name: 5-Aminofluorescein

CAS: 3326-34-9

EINECS: Not Available

MF: C₂₀H₁₃NO₅

MW: 347.32

MP: 275°C (decomposes, literature)

BP: Not Available

Density: Not Available

Appearance: Yellow to orange powder

Purity: ≥98% (HPLC)

Package: 5g, 10g, 25g, 100g, 500g, bulk package (sealed bottles / drums)

Application: Fluorescent labeling reagent for biomolecules (proteins, antibodies, peptides, amino acids); used in fluorescence microscopy, flow cytometry, immunoassays (ELISA), fluorescence in situ hybridization (FISH) and biochemical sensing; precursor for synthesis of fluorescein-based fluorescent probes and dyes; λ_ex/λ_em (in aqueous buffer, pH 9.0): ~495 nm / ~520 nm.

Other name: 5-AF; 5-FAM; 5-Fluoresceinamine; 5-Amino-3',6'-dihydroxy-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one; Fluorescein-5-amine; 5-Amino-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one

Storage: Store in a tightly sealed, light-protected container, under cool and dry place. Protect from moisture and light. Keep away from strong oxidizing agents. Stable under recommended storage conditions.

Production & Supply: Stable production with regular stock. Sample orders (5g / 10g / 25g) ship within 1–3 working days after payment; bulk quantities (100g / 500g and above) available upon request. Research-grade (≥98%) available.

Company Introduction: ALFA (Zhengzhou, Henan, China) is a professional supplier of fine chemicals, fluorescent probes and biochemical reagents. We provide quality-tested products, moisture-proof and light-protected packaging, and reliable worldwide delivery. Custom specifications (purity, packaging size) and bulk quotations are welcome.