DOT 3A, DOT 3AA, DOT 3A480X, DOT 4AA480 · External visual inspection · Anhydrous ammonia of at least 99.95% purity

For DOT 3A, DOT 3AA, DOT 3A480X, DOT 4AA480, test or inspection is External visual inspection; condition or service qualifier is Anhydrous ammonia of at least 99.95% purity; interval is at five-year intervals after the first inspection; regulation section is 49 CFR § 180.209, recorded from its source on 2026-08-06; source re-checked 2026-09-30.

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

DOT 3A, DOT 3AA, DOT 3A480X, DOT 4AA480 | Anhydrous ammonia of at least 99.95% purity.

— law.cornell.edu, retrieved 2026-08-06

Source

• law.cornell.eduhttps://www.law.cornell.edu/cfr/text/49/180.209

Last verified against source: 2026-09-30. Due for re-check by 2027-09-30. This page as Markdown · OKF bundle · full dataset as JSON.