adr_exemption_calculator
Calculate ADR 1.1.3.6 exemption points for dangerous goods. Compare total points to the 1,000 threshold to determine if the load qualifies for reduced requirements.
Instructions
Calculate ADR 1.1.3.6 "small load" exemption points for a dangerous-goods load. Each substance's transport category (0-4) sets a points multiplier (category 1 x50, 2 x3, 3 x1, 4 x0); points = quantity x multiplier, and a load totalling 1,000 points or less qualifies for reduced ADR requirements. Transport category 0 substances can NEVER use this exemption — has_category_zero flags them.
Provide un_number + quantity for a single substance, or items[] for a mixed load (items takes precedence if both are given). Quantities are in kg or litres per the substance's ADR unit.
Multi-variant UNs: a UN number with more than one ADR Table A row (packing group / concentration variant — e.g. UN 1789 PG II vs PG III have different transport categories) needs packing_group (I|II|III) or variant_index (from adr_lookup) to pin one row. Without a disambiguator the tool returns blocking_errors[AMBIGUOUS_UN_VARIANT] + human_review_required + candidates[] (each candidate's variant_index, packing_group, proper_shipping_name, transport_category, multiplier) and NO verdict, rather than silently guessing a row. Single-row UNs are unchanged.
Behavior: deterministic points arithmetic over ADR 2025 reference data; a UN that cannot be found returns blocking_errors (NOT_FOUND); exempt is the overall verdict. Rate-limited (anonymous use: 25 requests/day per IP): a 429 error body carries retry_after_seconds and a Retry-After header — back off and retry, or call get_subscribe_link for higher limits.
Returns: items[] (each with packing_group, variant_index, transport_category, multiplier, points), total_points, threshold (1000), exempt, has_category_zero, has_quantity_exceedance, warnings and message under result — or, when a UN is ambiguous, human_review_required + candidates[] with blocking_errors, plus confidence, _source and citation (the FreightUtils v1 response envelope).
Limitations: a deterministic calculation over reference data, not legal advice — even exempt loads keep core duties (packaging, marking, documentation), and mixed-packing rules still apply; verify against the current UNECE ADR text.
Related: adr_lookup (per-substance data incl. transport category + variant_index), adr_lq_eq_check (the LQ/EQ relief routes instead of 1.1.3.6).
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| items | No | Mixed-load items (use INSTEAD of un_number/quantity). | |
| quantity | No | Quantity for the single-substance check, in kg or litres per the substance's ADR unit. Example: 100. | |
| un_number | No | UN number for a single-substance check — 4 digits, optionally "UN"-prefixed. Example: "1203". | |
| packing_group | No | Packing group (I, II or III) — only needed to disambiguate a UN with more than one ADR Table A row (e.g. UN 1789). Ignored for single-row UNs. Single-substance form only. | |
| variant_index | No | ADR Table A variant index (as returned by adr_lookup) — pins one row when a UN has several variants that share a packing group (concentration bands). Ignored for single-row UNs. Single-substance form only. |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| ok | Yes | ||
| result | Yes | ||
| _source | Yes | ||
| citation | Yes | ||
| validity | No | ||
| warnings | No | ||
| confidence | Yes | ||
| blocking_errors | No | ||
| envelope_version | Yes | ||
| normalized_input | No |