Educational content for trained professionals. Not a Safety Data Sheet, not medical advice. In an emergency, call your local poison control or emergency services immediately. Terms of use.
Acid Green 25
Also known as: Acid Green 25 · 4403-90-1 · D&C Green No. 5 · Alizarin Cyanine Green F
- CAS No.
- 4403-90-1
- Formula
- C28H20N2Na2O8S2
- Molar mass
- 622.6 g/mol
- PubChem CID
- 20431
Harmful / Irritant
Environmental hazard
Summary
Acid Green 25 (C28H20N2Na2O8S2), CAS 4403-90-1. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.
Background
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Physical properties
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Hazards
Storage
Keep at room temperature, below 30 °C, out of direct heat.
Store somewhere well-ventilated and away from any ignition source.
Metal drums or tinted glass, tightly sealed.
Strong acids, strong bases and powerful oxidizers.
Personal protective equipment
Nitrile or butyl, at least 0.4 mm thick.
Safety goggles with side shields.
A2 organic-vapor cartridge if the room isn't well ventilated.
Occupational exposure limits (HSE)
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EU harmonised classification (ECHA C&L)
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Transport
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Compatibilities
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Open comparator with Acid Green 25Practical safety notes
- Irritant / harmful. Ventilate the workspace and avoid skin contact.
- Environmental hazard. Do not release to sewers or waterways; collect for hazardous waste disposal.
Derived from the GHS classification shown above. These notes are generic guidance and do not replace the manufacturer's SDS or your local risk assessment.
FAQ
Is Acid Green 25 flammable?+
Acid Green 25 (CAS 4403-90-1) does not carry the GHS02 flame pictogram in our records. Always confirm with the manufacturer's SDS section 9 (flash point) before assuming a product is non-flammable.
What PPE should I wear when handling Acid Green 25?+
Safety glasses with side shields and nitrile gloves are the baseline. Ventilation should be sufficient to keep vapours below the occupational exposure limit. Check SDS section 8 for material-specific breakthrough times.
How should Acid Green 25 be stored?+
Store Acid Green 25 (CAS 4403-90-1) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials.
Is Acid Green 25 dangerous for the environment?+
Yes. Acid Green 25 carries the GHS09 environment pictogram. Do not release to drains, soil or waterways; collect residues for hazardous-waste disposal in line with local regulations.
Where can I find the official Safety Data Sheet for Acid Green 25?+
Official, up-to-date SDS documents are published by each manufacturer (Sigma-Aldrich, Merck, Thermo Fisher, VWR, Carl Roth, etc.) and by regulators such as ECHA and NIOSH. This page is an educational summary and does not replace the manufacturer's SDS.
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Reference information only. Not a Safety Data Sheet. Always consult the manufacturer's official SDS and your local regulations before handling, storing or transporting any chemical. Terms of use.