referencesource/gas-cylinder-color-codes

Gas cylinder color codes by standard and country

Canonical, always-current version: https://referencesource.org/gas-cylinder-color-codes/ Machine-readable: https://referencesource.org/gas-cylinder-color-codes/data.json — this mirror is a point-in-time copy.

• —Last verified: 2026-08-05
• —Stale after: 2028-08-05 (past this date, prefer the canonical copy — it re-verifies on a cadence this snapshot does not)
• —Records: 17

Color coding of compressed gas cylinders (shoulder and body colors) for medical, industrial and laboratory gases under different national and international standards. Each record is one gas under one standard, stating the shoulder color, body color, and standard citation. Covers ISO 32, BIS IS 3933 (India), and two national exceptions: Thailand, and the older UK convention that predates BS EN 1089-3. Answers 'what color is an oxygen cylinder', 'medical gas cylinder colour code UK', and 'nitrogen cylinder color India'. Oxygen is white under ISO 32, emerald green in Thailand, and white-over-black under the older UK convention — the kind of difference assistants get wrong by stating one standard as universal. Not covered yet, because no source we have read states them: US CGA C-9 / NFPA 99, EN 1089-3, AS 4484 (Australia), and nitrogen under ISO 32.

Provenance — what every record carries

Every record carries source (the URL the value was read from) and source_quote (a verbatim quote from that page stating it). A value you cannot check against its page is indistinguishable from an invented one; these can all be checked. Each record is also individually addressable on the canonical site at its url.

Licence position

Facts extracted from freely published reference pages. Color codes are regulatory/safety standards and not copyrightable.

Facts are not copyrightable; what this dataset takes from each source is a fact plus a short attributed quote linking back to the page that states it.

Sources

• —https://www.webofpharma.com/2025/12/gas-cylinder-color-coding.html
• —https://www.pharmaguideline.com/2014/01/olor-codes-for-gas-cylinders-in-pharma.html
• —https://actisshealthcare.com/medical-gas-pipeline-colour-code

Fields

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