DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT 4BA, DOT 4BW · External visual inspection · Anhydrous mono, di, trimethylamines that are commercially free from corroding components

For DOT 3A, DOT 3AA, DOT 3B, DOT 4B, DOT 4BA, DOT 4BW, test or inspection is External visual inspection; condition or service qualifier is Anhydrous mono, di, trimethylamines that are commercially free from corroding components; 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 3B, DOT 4B, DOT 4BA, DOT 4BW | Anhydrous mono, di, trimethylamines that are commercially free from corroding components.

— 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.