General Topic

  1. Chemical Compatibility Chart — Plastics

    This chart is intended as a general guide for various materials and chemicals. It shows some of the materials used in Terra’s products and chemicals likely to be used with them. Testing is strongly recommended for extreme conditions of use, such as prolonged exposure or immersion, high temperatures and high concentrations. The acids, caustics and salts in this chart are assumed to be in solution. Materials may react differently to the pure substances (glacial acetic acid, for example). See Terra Universal's line of plastic Desiccators.

    Hazards Key
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    Hazards (Only the primary ones are shown. For example, chlorine is not shown as an asphy

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  2. Chemical Compatibility Chart — Rubber and Synthetics

    This chart is intended as a general guide for various materials and chemicals. It shows some of the materials used in Terra’s products and chemicals likely to be used with them. Testing is strongly recommended for extreme conditions of use, such as prolonged exposure or immersion, high temperatures and high concentrations. The acids, caustics and salts in this chart are assumed to be in solution. Materials may react differently to the pure substances (glacial acetic acid, for example). See Terra Universal's line of Rubber & Synthetic Gloves.

    Hazards Key
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    Hazards (Only

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  3. Chemical Compatibility Chart — Metals

    This chart is intended as a general guide for various materials and chemicals. It shows some of the materials used in Terra’s products and chemicals likely to be used with them. Testing is strongly recommended for extreme conditions of use, such as prolonged exposure or immersion, high temperatures and high concentrations. The acids, caustics and salts in this chart are assumed to be in solution. Materials may react differently to the pure substances (glacial acetic acid, for example). See Terra Universal's line of metal Pass-Throughs.

    Hazards Key
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    Hazards (Only the primary ones are shown. For example, chlorine is not sh

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  4. When Grounding Isn’t Enough for Static Control…

    When Grounding Isn’t Enough for Static Control…

    High-tech industries have long been plagued by an unseen foe. From semiconductors to medical devices, manufacturers are forced to accept high product rejection rates due to particle contamination or critical defects. Oftentimes, contamination issues and product damage in these industries can be traced back to uncontrolled static electricity. When static is allowed to build-up, it becomes a double threat to a cleanroom, increasing the chances of ESA-induced contamination and electrostatic discharge (ESD) damage.

     

    ESA Contamination in Cleanrooms

    Electrostatic attraction (ESA) is the phenomenon that causes dust to stick to the glass screen of an old vacuum tube television. When particles become statically charged by friction or contact with another material, they adhere to surfaces that have the opposite charge. While this may seem harmless in the example of the TV monitor, the semiconductor industry works on

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