For AI agents: read the machine-readable documentation index at /llms.txt or the single-file full reference at /llms-full.txt.

HAZARDOUS SUBSTANCES DISCLOSURE BY EMPLOYERS

M.G.L. pt. Part I, tit. Title XVI, ch. c. 111F
in effect

M.G.L. c. 111F, § 1 Definitions

M.G.L. c. 111F, § 2 Administrative responsibilities; rules and regulations; promulgation

M.G.L. c. 111F, § 3 Violations; investigations; notice; findings; elimination of violations; orders; review; penalties

M.G.L. c. 111F, § 4 Substance list; amendment procedures; concentration requirements for toxic or hazardous substances; dissemination of information

M.G.L. c. 111F, § 5 Material safety data sheets; trade secret claims; disclosure

M.G.L. c. 111F, § 6 Research laboratories; exemption

M.G.L. c. 111F, § 7 Containers; labels

M.G.L. c. 111F, § 8 Material safety data sheets; preparation; revision

M.G.L. c. 111F, § 9 Material safety data sheets; obligation to provide to purchaser

M.G.L. c. 111F, § 10 Material safety data sheets; mixtures

M.G.L. c. 111F, § 11 Material safety data sheets; employers' duties; employee's right to examine

M.G.L. c. 111F, § 12 Material safety data sheets; examination by employee's physician; disclosure of information

M.G.L. c. 111F, § 13 Discrimination against employees exercising rights under this chapter; complaint; investigation; hearing; review

M.G.L. c. 111F, § 14 Records; examination; copying

M.G.L. c. 111F, § 15 Instruction on nature and effects of toxic or hazardous substances to employees

M.G.L. c. 111F, § 16 Material safety data sheets; filing copies

M.G.L. c. 111F, § 17 Material safety data sheets; requests for copies

M.G.L. c. 111F, § 18 Endangerment of public health or safety; investigation; findings; review

M.G.L. c. 111F, § 19 Material safety data sheets; release to municipal officials

M.G.L. c. 111F, § 20 Material safety data sheets, release to treating physician; confidentiality agreement

M.G.L. c. 111F, § 21 Disclosure of information; public record; penalties

Source: Massachusetts General Court (malegislature.gov)URL: https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXVI/Chapter111FFetched: 10/20/2026