Fast Green 0.5%
Fast Green 0.5% is an acidic dye solution used in histology and biochemistry as a counterstain, providing green coloration to cytoplasm, collagen, and other tissue components. It is often used in combination with other stains for enhanced contrast.
Chemical Name
Fast Green FCF (Food, Cosmetic, and Pharmaceutical grade)
Synonyms
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Fast Green FCF
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Acid Green 3
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C.I. 42053
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0.5% Fast Green Solution
CAS Number
2353-45-9
Appearance
Dark green solution, clear to slightly viscous

Key Properties
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Concentration: 0.5% w/v
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Acidic dye suitable for counterstaining
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Water-soluble and stable in solution
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Provides sharp colour contrast with red or pink stains
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Ready-to-use formulation
Uses
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Histological counterstaining (e.g., with eosin or safranin)
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Collagen and cytoplasm staining
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Microscopy and tissue analysis
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Research and educational laboratories
Storage
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Store in tightly closed container
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Keep in a cool, dry place
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Protect from light to prevent degradation
Safety & Handling (SDS Summary)
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May cause skin and eye irritation
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Avoid ingestion and inhalation
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Wear PPE: gloves, lab coat, eye protection
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Handle in a well-ventilated area
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Dispose of according to local laboratory chemical waste regulations
| Weight | 3 kg |
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