Purchase of Controlled Items

Many kinds of chemicals and equipment are regulated by different authorities. These controlled items may require licenses to store or use them whereas some would have a maximum allowable quantity (MAQ) that can be kept in the school. In order to ensure, the requirements are followed, these chemicals and equipment needs to be tracked. If the items you are purchasing via ARIBA is listed as a controlled item, please indicate it as a controlled item by clicking ‘Yes’ in the purchase requisition (PR).
Controlled item button.png 

Please refer to the following SOP for procedure on purchasing chemicals.

List of Controlled Items

  1. Petroleum & Flammable Materials / Hazardous Substances / Biological Agents & Toxins / CWCs / EPs under the Regulated Chemical List

    Download the list of regulated chemicals here.​

  2. Flammable Gases/Gas Mixtures

    These include gases such as Hydrogen, Ethylene, Methane and gas mixtures such as 5%H2 + AR balance. (Note: This list is not exhaustive) Please refer to Safety Data Sheets of the gases/gas mixtures that you intend to purchase in order to determine if these gases/gas mixtures are flammable.

  3. High Power Lasers - Ionising Radiation (IR) Apparatus & Radioactive Material / Non-ionising Radiation (NIR) Irradiating Apparatus

    For Class 3B and above.

    Licences are required to manufacture, sell, possess, use, import and export a Class 3b or Class 4 laser apparatus.

    The person who operates the laser apparatus will need to apply for a licence, authorising him / her to operate the laser.

  4. Ultrasonic Apparatus
    Eg: Ultrasonic Baths/Sonicators

    Licences are required to manufacture, sell, possess, use, import and export an apparatus with power output of 1200 Watts and above.

    The person who operates the ulrasonic apparatus will need to apply for a licence, authorising him / her to operate the laser.​​

  5. Metallic Mercury and Merc​ury containing devices

    These include liquid mercury of any kind, either in an instrument (such as a thermometer, manometer or McCloud gauge), a bubbler, or just in a bottle.

  6. Special Cabinets(Please refer to the table below)

    ​Yellow flammable cabinets for storage of flammable solvents Yellow cabinet.jpg

    ​Grey cabinets for storage of chemicals Grey cabinet.jpg

    ​Acid​​ cabinets for st​orage of corrosive acids ​ Acid cabinet.jpg

    Cabinet with safety measures such as gas leak detectors, alarm system and gas clearing devices shall be installed for Toxic gas safe storage

  7. Pressure Vessels (Please refer to the table below)

    ​Air Receiver / Air Compressor / Steam Receiver air1.jpgair2.jpg
    ​Autoclave (Steam Boiler) Boiler.jpg

    ​Hoisting/Lifting Equipment/Cranes


    ​Hydrothermal Vessels/ metal pressure reaction vessels Hydrothermal.jpg