The OSHA Hazard Communication Standard (HCS) is the US workplace standard, administered by the Occupational Safety and Health Administration, that mandates how employers communicate chemical hazards to workers. Codified at 29 CFR 1910.1200, the HCS aligns with the UN Globally Harmonized System (GHS) and requires GHS-format Safety Data Sheets, GHS-aligned container labels, employee training, and a written workplace hazard communication programme. For Chinese chemical exporters to the US, OSHA HCS is the standard that the importing employer must satisfy under federal workplace law, and is the regulation that dictates the required SDS and label format on every chemical container that arrives at a US workplace.
What OSHA HCS requires
OSHA HCS requires every US employer with workers exposed to hazardous chemicals to maintain:
| Element | Requirement |
|---|---|
| Written hazard communication programme | Site-specific, listing chemicals on premises and how the employer addresses HCS |
| Chemical inventory list | All hazardous chemicals at the workplace |
| Safety Data Sheets | A current SDS for every hazardous chemical, accessible to workers during all shifts |
| Container labels | GHS-aligned label on every container of a hazardous chemical |
| Worker training | Initial training on HCS plus retraining when new hazards are introduced |
| Records | Training records, SDS file maintenance, programme updates |
The chemical importer is also a manufacturer-equivalent under HCS for foreign-sourced products. The importer must produce an HCS-compliant SDS and label for every product placed into the US workplace, even if the foreign manufacturer’s documentation does not meet HCS standards.
The HCS 16-section SDS
| Section | Title |
|---|---|
| 1 | Identification |
| 2 | Hazard(s) identification |
| 3 | Composition / information on ingredients |
| 4 | First-aid measures |
| 5 | Fire-fighting measures |
| 6 | Accidental release measures |
| 7 | Handling and storage |
| 8 | Exposure controls / personal protection |
| 9 | Physical and chemical properties |
| 10 | Stability and reactivity |
| 11 | Toxicological information |
| 12 | Ecological information* |
| 13 | Disposal considerations* |
| 14 | Transport information* |
| 15 | Regulatory information* |
| 16 | Other information |
Sections 12-15 are not strictly required to be authored by a US manufacturer or importer (asterisks above), but most HCS SDS documents include them in full because international harmonisation expects them. Sections 1-11 and 16 are mandatory under HCS.
The structure aligns directly with GB/T 17519 on the China side and with CLP on the EU side. The differences are in the regulatory references in Section 15 and in the cross-references to other US laws in Sections 8 (PEL/TLV exposure limits) and 11 (cancer classifications under NIOSH, IARC, and NTP).
GHS pictograms required on US labels
OSHA HCS adopted nine of the GHS hazard pictograms. A US container label must carry the relevant pictograms inside red diamond borders, plus signal word, hazard statements (H-codes), and precautionary statements (P-codes).
| Pictogram | Hazard class |
|---|---|
| Flame | Flammables, self-reactives, pyrophorics, organic peroxides |
| Flame over circle | Oxidisers |
| Exploding bomb | Explosives, self-reactives, organic peroxides |
| Skull and crossbones | Acute toxicity (Category 1, 2, 3) |
| Corrosion | Skin/eye corrosion, metal corrosion |
| Gas cylinder | Compressed gases |
| Health hazard | Carcinogen, mutagen, reproductive toxicity, respiratory sensitiser |
| Exclamation mark | Less severe health hazards |
| Environment | Aquatic toxicity (optional under HCS but commonly used) |
The hazard statements (H-codes) and precautionary statements (P-codes) are the same as in CLP and GB/T 17519 because they come from the GHS source. The signal word is “Danger” or “Warning” depending on hazard severity.
For a complete reference to the symbols and their hazard classes see the GHS pictograms entry.
The 2024 update to GHS Rev. 7
OSHA published the final rule updating HCS to GHS Rev. 7 on 17 May 2024 (Federal Register 89 FR 44144). Compliance dates for chemical manufacturers, importers, and distributors:
- 19 January 2026, chemical manufacturers, importers, and distributors must update product SDS and labels for substances
- 19 July 2027, same compliance date for chemical mixtures
- 19 January 2027 and 19 July 2028, corresponding employer compliance dates for substance and mixture workplace programmes
The 2024 update brought several changes that affect Chinese exporters: revised hazard category criteria, expanded exemptions for combustible dusts, additional precautionary statements, and updated requirements for transportation containers.
A Chinese factory shipping into the US after January 2026 should make sure its English SDS reflects GHS Rev. 7. Most factories doing volume US trade have already updated. Smaller factories supplying through trading houses sometimes lag.
When the OSHA HCS SDS is the wrong document for the destination
The OSHA HCS SDS is the US-side document. For other markets the destination standard applies:
- EU shipments require a CLP-compliant SDS in the relevant local language
- Australian shipments require an SDS aligned with the Safe Work Australia format
- Korean shipments require a K-REACH-compliant SDS in Korean
- China-side documentation (for in-China trucking and storage) requires GB/T 17519
Factories that ship into multiple regulated markets typically maintain a master English SDS in the most rigorous format (often CLP) and produce country-specific variants from that master. The HCS-format SDS is then a country-specific variant rather than the source document.
How OSHA HCS catches importers off guard
Three failure patterns recur for Chinese chemical exports into the US:
- Importer uses the Chinese factory’s SDS unchanged. A bilingual GB/T 17519 SDS does not satisfy HCS at the US workplace because Section 15 references Chinese regulations and Section 8 lacks US PEL/TLV values. The importer must produce an HCS-compliant SDS for the US workplace, even if the cargo cleared customs with the Chinese SDS.
- Container labels in Chinese only. A 200-kg drum arriving with Chinese labels and no English signal word, H-codes, or pictograms cannot be placed into a US workplace under HCS. Workers cannot read the hazard. The importer must apply HCS-compliant labels before the cargo enters the workplace.
- GHS Rev. 7 lag. A factory still issuing GHS Rev. 4 SDS documents in 2027 places its US importer in non-compliance with the 2024 final rule. The importer must rewrite the SDS at its own cost.
The mitigation: HCS SDS authoring should be specified in the purchase order, with the factory providing the master English SDS aligned to the buyer’s requested HCS Rev. 7 format. For high-volume US trade, the factory often holds a US-resident regulatory consultant to maintain HCS documentation for its export-customer base.
How OSHA HCS interacts with TSCA
OSHA HCS is the workplace standard. TSCA is the chemical inventory standard administered by the EPA. The two regimes coexist:
- TSCA controls whether a chemical can be imported into the US (inventory listing, Section 5 PMN process for new chemicals, restrictions under Section 6)
- OSHA HCS controls how the chemical’s hazard is communicated at the workplace once it is in the US
A chemical can be TSCA-cleared at customs and still trip on HCS at the workplace if the SDS or labels are deficient. The two regimes do not talk to each other directly.
Practical sourcing notes
For chemical shipments into Houston, New Orleans, Long Beach, or Newark, the standard practice is: confirm the factory’s English SDS aligns with HCS / GHS Rev. 7, confirm container labels carry English signal word, H-codes, and pictograms in red-bordered diamonds, and confirm the importer holds a current TSCA certification cover sheet for the chemical inventory listing. The factory’s cargo should ship with both the GB/T 17519 SDS (for in-China leg) and the HCS SDS (for the US workplace) as standard practice.
Related terms
SDS is the GHS-aligned document. MSDS is the older 9-section format. GHS is the UN harmonised classification scheme. GB/T 17519 is the Chinese SDS standard. CLP is the EU implementation. TSCA is the US chemical inventory regime. Hazard statements and precautionary statements are the H-codes and P-codes used on labels and SDS documents.