Acrylonitrile
For Acrylonitrile, cfr section is 1910.1045; action level is 1 ppm as an eight (8)-hour time-weighted average; pel is two (2) parts acrylonitrile per million parts of air (2 ppm) as an eight (8)-hour time-weighted average; surveillance trigger is each employee who is or will be exposed to AN at or above the action level, without regard to the use of respirators; exam frequency is at least annually for all employees specified in paragraph (n)(1) of this section, verified against its source on 2026-09-17.
- Substance
- Acrylonitrile verified
- CFR section
- 1910.1045
- Action level
- 1 ppm as an eight (8)-hour time-weighted average verified
- PEL
- two (2) parts acrylonitrile per million parts of air (2 ppm) as an eight (8)-hour time-weighted average verified
- Surveillance trigger
- each employee who is or will be exposed to AN at or above the action level, without regard to the use of respirators verified
- Exam frequency
- at least annually for all employees specified in paragraph (n)(1) of this section verified
- Record retention
- The employer shall assure that this record be maintained for at least forty (40) years, or for the duration of employment plus twenty (20) years, whichever is longer verified
What the source says
the employer 's reliance on the data, as provided in paragraph (q) of this section. (b) Definitions. Acrylonitrile or AN means acrylonitrile monomer, chemical formula CH2 = CHCN. Action level means a concentration of AN of 1 ppm as an eight (8)-hour time-weighted average.
— law.cornell.edu, retrieved 2026-08-12
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
Action level
(3) An employer relying upon exemption under paragraph (a)(2)(ii) shall maintain records of the objective data supporting that exemption, and of the basis of the employer 's reliance on the data, as provided in paragraph (q) of this section. (b) Definitions. Acrylonitrile or AN means acrylonitrile monomer, chemical formula CH2 = CHCN. Action level means a concentration of AN of 1 ppm as an eight (8)-hour time-weighted average.
PEL
OSHA Area Office means the Area Office of the Occupational Safety and Health Administration having jurisdiction over the geographic area where the affected workplace is located. (c) Permissible exposure limits —(1) Inhalation. (i) Time weighted average limit (TWA). The employer shall assure that no employee is exposed to an airborne concentration of acrylonitrile in excess of two (2) parts acrylonitrile per million parts of air (2 ppm) as an eight (8)-hour time-weighted average.
Surveillance trigger
(4) The employer shall assure that employees working in the regulated area wash their hands and faces prior to eating. (n) Medical surveillance —(1) General. (i) The employer shall institute a program of medical surveillance for each employee who is or will be exposed to AN at or above the action level, without regard to the use of respirators.
Exam frequency
(3) Periodic examinations . (i) The employer shall provide the examinations specified in paragraphs (n)(2)(i), (ii), and (iv) of this section at least annually for all employees specified in paragraph (n)(1) of this section.
Record retention
(ii) This record shall include: (A) A copy of the physician's written opinions; (B) Any employee medical complaints related to exposure to AN; (C) A copy of the information provided to the physician as required by paragraph (n)(5) of this section; and (D) A copy of the employee's medical and work history. (iii) The employer shall assure that this record be maintained for at least forty (40) years, or for the duration of employment plus twenty (20) years, whichever is longer.
— all from law.cornell.edu, retrieved 2026-08-12
Source
- law.cornell.eduhttps://www.law.cornell.edu/cfr/text/29/1910.1045