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.
Solvent Yellow 56
Also known as: 4-(Diethylamino)azobenzene · 2481-94-9 · Solvent Yellow 56 · Diethyl Yellow
- CAS No.
- 2481-94-9
- Formula
- C16H19N3
- Molar mass
- 253.34 g/mol
- PubChem CID
- 17204
Harmful / Irritant
Health hazard
Summary
Solvent Yellow 56 (C16H19N3), CAS 2481-94-9. 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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Open comparator with Solvent Yellow 56Practical safety notes
- Irritant / harmful. Ventilate the workspace and avoid skin contact.
- Serious health hazard (carcinogen, mutagen, reprotoxic, respiratory sensitizer). Substitute if possible; otherwise closed systems and medical surveillance.
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 Solvent Yellow 56 flammable?+
Solvent Yellow 56 (CAS 2481-94-9) 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 Solvent Yellow 56?+
Safety glasses with side shields and nitrile gloves are the baseline. Work inside a fume hood or use a suitable respirator. Check SDS section 8 for material-specific breakthrough times.
How should Solvent Yellow 56 be stored?+
Store Solvent Yellow 56 (CAS 2481-94-9) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials.
Is Solvent Yellow 56 dangerous for the environment?+
No specific environmental pictogram (GHS09) is listed in our records for Solvent Yellow 56, but any chemical waste should be handled through your site's hazardous-waste procedure, not poured down the drain.
Where can I find the official Safety Data Sheet for Solvent Yellow 56?+
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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