2.4 SDS and Shipping Papers

Placards and UN numbers get you into the right family of hazard. Two documents finish identification: the safety data sheet (workplace product data) and the shipping paper (transport legal description). NFPA 470 11.2 has you collect and interpret hazard information. OSHA 1910.120(q)(6)(iii)(B) has you classify and identify. Neither standard lets you treat a wall-mounted SDS as a bill of lading, or an ERG orange guide as a product-specific SDS.

OSHA SDS: 16 sections, not a shipping paper

Under OSHA Hazard Communication (29 CFR 1910.1200), manufacturers and importers supply a safety data sheet in the 16-section GHS format. That is a workplace document. It may travel with a delivery, sit in a binder at a fixed facility, or be emailed from a shipper or CHEMTREC. It is not the DOT shipping paper, even when Section 14 (Transport information) reprints UN data.

The 16 sections, and what a technician actually uses:

OSHA enforces the content of Sections 1–11 and 16. Sections 12–15 are part of the internationally harmonized 16-section layout; OSHA does not police environmental and transport sections the same way because those are outside OSHA's statute. A blank or thin Section 14 does not mean the drum is unregulated in transport.

SDS may lag the scene. The binder in the office may describe last week's product. A blended load, a mis-labeled tote, or a reaction product after fire will not match Section 3. Use the SDS for identification, composition, first aid, firefighting, accidental release, handling, exposure controls/PPE, physical/chemical properties, stability/reactivity, and toxicology — then confirm with monitoring (later chapters) and with what the container and papers actually show.

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Shipping papers: the transport identity document

DOT shipping papers carry the basic description of each hazardous material offered for transportation (49 CFR 172.200–172.204, 172.202). The name of the document changes with mode:

If you cannot find papers, say so in the size-up. Missing papers are a fact, not permission to invent a proper shipping name from tank color.

Basic description order (current DOT)

49 CFR 172.202 requires this sequence — and this is the sequence exams use after the U.S. aligned with UN order:

1. Identification number, preceded by UN, NA, or ID as appropriate
2. Proper shipping name (plus technical name in parentheses when required for n.o.s. entries)
3. Hazard class or division number (subsidiary class in parentheses when required)
4. Packing group in Roman numerals, when a packing group is assigned (PG I, PG II, or PG III, or the Roman numerals alone)

Example: UN1203, Gasoline, 3, PG II

The old order (proper shipping name first, then class, then UN number) is outdated. If an older textbook still leads with the name, do not copy that order onto an exam answer. Quantity, number of packages, emergency-response telephone number, and additional entries (marine pollutant, poison-inhalation-hazard, RQ, EX numbers for explosives) ride with the basic description; they do not replace it.

Packing groups I / II / III

When assigned, packing groups communicate degree of danger:

• PG I — great danger (highest packing/performance bar among the three)
• PG II — medium danger
• PG III — minor danger

Packing groups are not used for all classes. Class 2 gases and Class 7 radioactive materials typically have no packing group. Explosives are organized by division and compatibility group, not PG I–III. Some Class 9 entries have a packing group; some (lithium batteries, dry ice) do not. Never force PG II onto a chlorine 2.3 cylinder just to make the basic description look complete. Never treat a packing group as an NFPA 704 rating: PG I is not a blue 1, and a red 4 is not PG IV.

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Emergency contact number and CHEMTREC

49 CFR 172.604 requires a 24-hour emergency-response telephone number on the shipping paper. The number must reach a person who is knowledgeable about the material and has comprehensive emergency-response and incident-mitigation information, or who has immediate access to such a person. Many shippers contract CHEMTREC (Chemical Transportation Emergency Center) or an equivalent emergency-response information service; the number printed on the paper is the one you call, along with the shipper name and the UN/NA number. The 24-hour number is a shipping-paper requirement, not a substitute for having the paper. An SDS emergency phone in Section 1 is useful; it still does not turn the SDS into a bill of lading.

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Two traps that fail technician exams

Trap 1: Treating an SDS as a shipping paper. An SDS taped to a visor does not satisfy 49 CFR 172 shipping-paper rules. It may lack the basic description order, the 24-hour number in the required form, the quantity, and the certification. You can use the SDS. You cannot declare that the transport document requirement is met because a GHS SDS was in the cab. Ask again for the bill of lading, consist, dangerous cargo manifest, or air waybill.

Trap 2: Treating the ERG orange guide as SDS-level product-specific data. ERG orange guides are generic for a group of UN numbers that share similar first-responder tactics. Many different products share one guide number. The orange guide will not give you the component percentages in Section 3, the occupational exposure limit in Section 8, or the polymerisation warning in Section 10. Conversely, an SDS will not give you the ERG's isolation distances or the three-digit guide format you use in the first 15 minutes. Use shipping papers + UN/NA + ERG for initial transport actions; use SDS for product-specific chemistry and PPE; use monitoring to confirm what is actually in the air.

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How this chapter fits Analyze (11.2)

On a technician assignment you build identification in layers:

1. Container and occupancy — MC 306/DOT 406 oval versus MC 312/DOT 412 corrosive tanker; warehouse versus highway.
2. DOT class diamonds — Classes 1–9, divisions, primary and subsidiary, refusing color-alone ID.
3. Placards vs labels vs GHS — vehicle versus package versus workplace pictogram; orange panel ID number; marine pollutant, inhalation hazard, HOT, fumigant, cargo aircraft only.
4. UN/NA number — international versus North America-only; ERG yellow-page path; 2024 warfare-agent listing change.
5. NFPA 704 — facility 0–4 ratings, not a UN number.
6. Shipping papers — basic description in the correct order, packing group when assigned, 24-hour number, correct document for the mode.
7. SDS — 16 sections for chemistry and PPE, with the humility to verify by monitoring.

Instruments, container behavior, and the full ERG skillset come next. If this layer is wrong, those layers inherit the error.