Understanding the Safety Profile

Silicone Diffusion Pump Oil IOTA 705 is a specialized chemical product that, like all industrial fluids, requires proper handling and storage to ensure both personnel safety and product performance. With a flash point of ≥243°C, the fluid is classified as a combustible liquid rather than a flammable liquid, which provides a significant safety advantage in high-temperature vacuum applications. However, this does not mean that safety considerations can be overlooked.

Safe Handling Practices

When handling IOTA 705, personnel should wear appropriate personal protective equipment, including chemical-resistant gloves and safety glasses. While the fluid is generally considered to have low toxicity, prolonged skin contact should be avoided, and any spills should be cleaned up promptly using absorbent materials. The fluid's colorless, transparent appearance means that spills on light-colored surfaces may be difficult to see, so adequate lighting and housekeeping are important.

Storage Requirements

IOTA 705 should be stored in its original, tightly sealed containers in a cool, dry, well-ventilated area away from direct sunlight and heat sources. The container should be kept upright to prevent leaks, and the storage area should be clearly labeled. While the fluid is chemically stable under normal storage conditions, exposure to strong oxidizing agents should be avoided. Temperature extremes should also be avoided; while the congealing point is ≤-14 to -18°C, storing the fluid at very low temperatures can make it difficult to pour and may affect its performance during initial pump start-up.

Operational Safety in the Diffusion Pump

During operation, the diffusion pump heater brings the oil to temperatures where it vaporizes and forms the pumping jets. It is critical that the heater temperature does not exceed the oil's thermal stability limits. While the flash point of ≥243°C provides a safety margin, operators should monitor the pump temperature and ensure that the backing pump is functioning correctly to prevent pressure buildup in the pump exhaust. A malfunctioning backing pump can cause the diffusion pump oil to overheat, potentially leading to decomposition and the release of irritating vapors.

Emergency Procedures

In the event of a fire involving IOTA 705, standard Class B fire extinguishing methods should be used. The fluid's high flash point means that it is unlikely to ignite under normal operating conditions, but if a fire does occur, the burning oil can produce dense smoke and decomposition products. Personnel should be trained in the location and use of fire extinguishers, and evacuation procedures should be clearly posted and regularly practiced. For spills, the area should be ventilated, and the spilled material should be absorbed and disposed of in accordance with local regulations.


Silicone Diffusion Pump Oil IOTA 705 （Replacement for DC705）-IOTA