Technical Reference · Shelf Life
Gas Mixture Expiration.
Shelf life from fill date for every Trigas USA calibration gas configuration. Use this chart to plan recalibration cycles and inventory rotation across your fleet.
Gas Mixture
Expiration from fill date
Nonreactive Mixtures
Standard nonreactive and 3-gas nonreactive mixtures. 103-Liter cylinders available upon request.
48
Months
Reactive H₂S or SO₂
Single-component reactive mixtures containing H₂S or SO₂.
24
Months
Reactive 4-Gas (H₂S)
4-gas reactive mixtures containing H₂S, including options with SO₂ and 5-gas configurations.
24
Months
Highly Reactive Gases
Ammonia (NH₃), Chlorine (Cl₂), HCl, HCN, NO, NO₂.
12
Months
Pure Gases
Argon UHP, Air UZ, Nitrogen, Methane & Hydrogen.
48
Months
Storage
Keep cylinders upright, dry & cool.
Store all cylinders upright in a well-ventilated area, away from direct sunlight and heat sources. Follow the Safety Data Sheet (SDS) guidelines for each gas type. Improper storage can void the shelf life listed above.
Technical Support
Questions about recertification?
For technical questions, recertification options, or special gas configurations not listed here, contact our team — most requests answered within 1 business day.
Need a configuration not listed?
Custom mixes, special tolerances, and bulk programs available. We'll match your detector requirements and quote within 24 hours.