UN 2716 — Butynediol
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
Butynediol is a toxic material that may be shipped as solid, viscous liquid or solution. Avoid skin contact, ingestion and inhalation exposure.
Hazard overview: Butynediol is a toxic material requiring control of inhalation, ingestion and skin exposure. Fire or heating can increase toxic vapor, dust or smoke hazards.
Response guidance: Isolate the release, keep personnel upwind and prevent contact with liquid, solid or runoff. Use Alcohol-resistant foam, CO2, dry chemical and water spray for cooling as appropriate for fire, while protecting waterways.
Firefighter training notes: Train crews to identify Butynediol by UN number, placard, ERG guide and SDS before choosing entry, isolation or extinguishment tactics.
Regulatory context: Use UN 2716, ERG 153, SDS, container labels and shipping papers to confirm the exact hazard profile and protective action distances.
Storage & handling: Store in closed, compatible containers away from heat, ignition sources and incompatible materials; keep the area ventilated and protected from damage.
UN 2716 Quick Details
Common Hazards of UN 2716
- Toxic exposure by inhalation, ingestion or skin contact may cause serious injury.
- Contact can irritate or burn skin and eyes; avoid all unnecessary contact.
- Fire may generate irritating, corrosive or toxic gases.
- Combustible material may burn, although it may not ignite readily.
- Contaminated runoff may be toxic or corrosive and should be contained.
- Vapors, dust or aerosols can be more hazardous in confined or poorly ventilated areas.
- Heated containers may rupture or release hazardous vapors.
Chemical Identity & Physical Properties
White to pale yellow crystalline solid or viscous liquid depending on temperature; slight characteristic odor.
| Also known as | butyne-diolbutynedioldihydroxy-butynebishydroxymethylacetylene |
| CAS Number | 110-65-6 |
| Appearance | White to pale yellow crystalline solid or viscous liquid at room temperature with a slight characteristic odor. May appear as a syrupy liquid or solid depending on temperature. |
| Flash Point | 152C (306F) |
| Boiling Point | 238C (460F) with decomposition |
| Vapor Density | 3.0 (heavier than air) |
| Water Reactivity | Soluble in water; aqueous solutions may be corrosive |
Fireground Response Guidance — UN 2716
Extinguishing Media
PPE Requirements
Use SCBA with chemical-resistant gloves, boots and protective clothing; upgrade to full chemical protection when contact or vapor levels are uncertain.
Isolation & Evacuation
First Actions for a UN 2716 Incident
- Call 911 and the emergency response number shown on shipping papers or container documents.
- Keep unauthorized personnel away and establish an initial isolation perimeter.
- Stay upwind, uphill and upstream; avoid low areas where vapors or runoff may collect.
- Avoid breathing vapors, dust, smoke or mist and prevent skin and eye contact.
- Do not touch damaged containers or spilled material without appropriate chemical PPE.
- Ventilate confined spaces only when personnel are trained, monitored and properly equipped.
- Use ERG guidance, SDS, shipping papers and air monitoring before committing crews.
📋 Copy & Share Field Card
UN 2716 — ButynediolUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.