Color Codes for the Gas Cylinders in Pharmaceuticals : Pharmaguideline
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  • Apr 17, 2022

    Color Codes for the Gas Cylinders in Pharmaceuticals

    Gas cylinders color codes and their identification according to the gas property.
    Gas cylinders are widely used in pharmaceutical industries. It is important to know the color codes of the same because most of the gas cylinders don’t have any written information about their contents. Color codes are given for safety purpose and to prevent mix-ups in handling.


    The color codes are specific for the different gases. Gas cylinders may be colored with one or more colors according to gas filled in them. Upper curved part of the cylinder is known as shoulder and the lower as the body. 

    Color Code
    Different color combinations of shoulder and body are used for different gases. Color codes of gas cylinders may differ from country to country.

    Following table shows the general concept for the coding-

    S. No.
    Gas Cylinder
    Color
    Shoulder
    Body
    1.
    Air
    Grey
    Grey
    2.
    Ammonia
    Red
    Yellow & Black
    3.
    Carbon Dioxide
    Silver
    Black
    4.
    Chlorine
    Yellow
    Yellow
    5.
    Helium
    Brown
    Brown
    6.
    Hydrogen
    Red
    Red
    7.
    Nitrogen
    Black
    Grey
    8.
    Oxygen
    White
    Black

    The color of the gas cylinder indicates the hazard but not the filled gas. Poisonous and corrosive gas cylinders have yellow color while red colored cylinders indicate the inflammable gas in them. Oxidizing gas cylinders are light blue in color and inert gas cylinders are bright green.

    Gas Property

    Note: Valves of oxygen gas cylinders should not be lubricated using oil and grease.

    11 comments: Post Yours! Read Comment Policy ▼

    1. It is a universal code. Perhaps someone can inform the reference.

      Paulus G

      ReplyDelete
    2. Thanks for the providing a valuable knowledge about pharmaceuticals. but in the above text, how to differentiate the oxygen and carbon dioxide cylinders ? while both color code are same.

      ReplyDelete
    3. How can we differentiate between oxygen and carbon dioxide cylinders ? as per above text the color code for the both are same.

      ReplyDelete
    4. Thanks for sharing

      ReplyDelete
    5. Thanks for sharing

      ReplyDelete
    6. The shoulder colors are different .For Oxygen its white and for Carbon dioxide its Silver

      ReplyDelete
    7. Thanks very much for providing good information.

      ReplyDelete
    8. What is the colour code of carbon monoxide gas cylinder

      ReplyDelete
    9. Which of the cylinders can be used for medical oxygen gas??

      ReplyDelete
      Replies
      1. Black color cylinder with white shoulder.

        Delete
    10. WHAT IS THE COLOUR CODE OF COMMERCIAL OXYGEN GAS CYLIDER?

      ReplyDelete

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