PHOTOGRAPHY DYESTUFF

Product: Coumarin 4.

CAS #: 90-33-5.

Synonyms 7-Hydroxy Methylbenzpyrone; Beta Methylumbelliferone; Hymecromone; 7-Hydroxy-4-Methyl-2,h-1-Benzo-pyran-2-one; 7-Hydroxy-4-methyl Coumarin; 7-Hydroxy-4-methyl-2-Oxo-3-Chromene; 4-Methylumbelliferone.

Molecular Formula: C10H8O3. Molecular Weight: 176.17.

Structural Formula:

Description: Pale yellow crystalline powder.

Absorption: 322 NM max. (in Methanol).

Molar Absorptivity: 1.47x10⁴ L mole^-1 cm^-1 (at 322 NM).

Fluorescence: 386 NM max. (in Methanol).

Optimum Lasing: 404 NM.

Assay: 99.0% min.

Quantity Available: 500.0 kilos every month.

Packing: 25.0 kilos net, new, polylined HDPE drums.

Delivery: 4 to 6 weeks from receipt of confirmation.

Price: Available on request.

Payment: Negotiable.

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