Hazard Communication in Indiana: IOSHA and the 2024 HazCom Update

Short answer: Adopted, Indiana effective date November 16, 2024 (corrections April 9, 2025). Hazard communication in Indiana is enforced by IOSHA under Indiana’s State Plan, and State Plans adopt federal OSHA’s 2024 update on their own timelines. Status, rule citation and dates checked October 10, 2026 against official sources linked below; not legal advice.

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Who enforces HazCom in Indiana

Indiana runs its own OSHA-approved State Plan. Workplace hazard communication is enforced by Indiana OSHA (IOSHA), part of the Indiana Department of Labor.

The Indiana State Plan “applies to all private sector workplaces in the state”, except areas federal OSHA keeps, including maritime employment, contractors in U.S. Postal Service mail operations, and aircraft cabin crew on aircraft in operation. It also covers state and local government employers, but not federal government employers (osha.gov/stateplans/in).

The Indiana HazCom rule

29 CFR 1910.1200, adopted and incorporated by reference by the Indiana Occupational Safety Standards Commission (IOSSC) through Adoption by Reference bulletins.

Is the 2024 HazCom update in effect in Indiana?

“The Indiana Department of Labor adopts and incorporates by reference the OSHA standards in 29 CFR Part 1910 Hazard Communication Standard, published originally in the Federal Register, May 20, 2024 … Federal effective date: July 19, 2024. Indiana effective date: November 16, 2024.” — IOSSC Bulletin #24-01

“Federal effective date: October 9, 2024. Indiana effective date: April 9, 2025.” — IOSSC Bulletin #24-02

The 2026 federal date extension: we could not confirm from an official Indiana source on October 10, 2026 whether IOSHA has also adopted federal OSHA’s January 15, 2026 four-month extension of the compliance dates (91 FR 1695). The 2024 rule as first published set July 20, 2026 for employers to update labels, the written program and training for substances, and January 19, 2028 for mixtures; with the extension, the federal dates are November 20, 2026 and May 19, 2028. Ask IOSHA which date it enforces (contact IOSHA). The cautious course is to treat the earlier date as already here.

Indiana-specific differences

osha.gov notes that IOSHA “adopts all OSHA standards and regulations except it has a unique excavations standard”; we found no Indiana-specific HazCom requirement beyond the federal text.

The federal dates, for context

Federal OSHA’s updated standard was published May 20, 2024 (89 FR 44144) and took effect July 19, 2024. The compliance dates in 29 CFR 1910.1200(j) (eCFR, checked October 10, 2026) are:

Between May 20, 2024 and those dates, anyone covered may comply with the revised standard, the version in effect as of July 1, 2023, or both ((j)(4)). These dates already include the four-month extension OSHA published on January 15, 2026 (91 FR 1695); the 2024 rule as first published said January 19, 2026, July 20, 2026, July 19, 2027 and January 19, 2028. A State Plan that adopted the 2024 rule but not the extension, or that set its own dates, can have different deadlines, which is why the state section above matters.

What to do now (true in every state)

Every State Plan’s HazCom rule must be at least as effective as the federal one, so these basics apply whichever version your state enforces today:

• A written hazard communication program with a list of the hazardous chemicals on site, using the product identifier on each SDS. See what the written program must contain.
• A current SDS for every hazardous chemical, readily accessible to employees on every shift in their work areas. Your supplier writes the SDS and must send it with the first shipment; your job is to obtain, keep and give access to it. See SDS requirements for employers.
• Labels on shipped containers left intact, and workplace labels on containers you fill yourself. See secondary container labels.
• Training at initial assignment and whenever a new chemical hazard is introduced. See HazCom training requirements.
• The 2024 update: as revised SDSs arrive from suppliers, swap them in, and update workplace labels, the written program and training by the date that applies in your state (see above). If your state’s date is unclear, ask the agency and plan for the earliest possible date.

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Tier II is a different law

EPCRA Tier II chemical inventory reporting comes from a separate federal law (the Emergency Planning and Community Right-to-Know Act, an EPA program) and is filed with state and local agencies, not with IOSHA. See Tier II reporting in Indiana.

Other State Plan states

See the 2024 HazCom update status in all State Plan states we cover.

Sources (checked October 10, 2026)

• IOSSC Adoption by Reference Bulletin #24-01
• IOSSC Bulletin #24-02
• osha.gov: Indiana State Plan
• eCFR: 29 CFR 1910.1200(j)
• Federal Register 91 FR 1695 (January 15, 2026)

Questions about how IOSHA applies a rule to your workplace: contact IOSHA.

Educational information only, not legal or compliance advice. Requirements can vary by product, use and jurisdiction — verify at osha.gov/hazcom and 29 CFR 1910.1200, or consult a qualified professional.