☣️ UN 1035 • CLASS 2
Ethane, compressed
Placard: Flammable Gas. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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Quick details
UN 1035
Class: 2
Placard type: Flammable Gas
ERG: Guide 115 (check current ERG)
Verify shipping papers and exact product details; use ERG Guide 115 for initial actions and isolation/evacuation guidance.
Chemical & Response Details
| Also known as | Ethyl hydrideDimethylMethylmethaneBimethylR-170 |
| CAS Number | 74-84-0 |
| Appearance | Colorless, odorless gas at room temperature. Shipped as a compressed liquefied gas under high pressure. |
| Flash Point | Not applicable (gas with autoignition temperature 472°C/882°F) |
| Boiling Point | -88.6°C (-127.5°F) |
| Vapor Density | 1.04 (slightly heavier than air) |
| Water Reactivity | No significant reaction with water; insoluble |
| Extinguishing | Water spray for cooling cylinders, CO2, dry chemical; foam not typically needed for gas |
| PPE | ⚠️ Level B minimum with SCBA required; vapor-protective clothing if leak or confined space entry |
| Isolation | ERG 115: isolate 100m all directions; if tank/rail car involved in fire, isolate 800m all directions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- EXTREMELY FLAMMABLE.
- Will be easily ignited by heat, sparks or flames.
- Will form explosive mixtures with air.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- Vapors may travel to source of ignition and flash back.
- Cylinders exposed to fire may vent and release flammable gas through pressure relief devices.
- Containers may explode when heated.
- Ruptured cylinders may rocket.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Many gases are heavier than air and will spread along the ground and collect in low or confined areas
- Isolate spill or leak area for at least 100 meters (330 feet) in all directions.
- Consider initial downwind evacuation for at least 800 meters (1/2 mile).
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MAYDAY / HAZMAT QUICK NOTE UN 1035 — Ethane, compressed Class: 2 | Placard: Flammable Gas ERG: Guide 115 (check current ERG) FIRST ACTIONS: use SOP/SOG + ERG; stage upwind; isolate; deny entry; request Hazmat.
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FAQ
EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level B minimum with SCBA required; vapor-protective clothing if leak or confined space entry
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 115 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles. This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.