IRSST - Institut de recherche Robert-Sauvé en santé et en sécurité du travail

Diethyl phthalate

French name in the regulation: Phtalate de diéthyle
CAS : 84-66-2
Synonyms: Phthalic acid, diethyl ester; 1,2-Benzenedicarboxylic acid, diethyl ester; Ethyl phthalate

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)
ppm mg/m3 f/cc Notes
TWAEV - 5 - -
STEV - - - -
Ceiling - - - -
Simple asphyxiant Percutaneous
Minimum exposure Sensitizer
Prohibited use Prohibited recirculation

TWA adjustment for unusual work schedules

III : Weekly adjustment

CNESST – Toxicological Index Service

Consult REPTOX file: Diethyl phthalate


Phtalate de diéthyle

Method: IRSST - 391
Sampling device:
Sampling media required:
912 Cellulose nitrate filter 37 mm

Flow rate: 1,0 L/min
TWA sampling volume: 30 L
STEL sampling volume: -
Remarks: Store in refrigerator after sampling.
Principle: High performance liquid chromatography with UV detection (HPLC-UV)
Precision (%): 1,0
Minimum reported value: 8 µg
IRSST. "Détermination des phtalates dans l'air des lieux de travail". Méthode 391. Non publiée.
Following the amendment of Appendix 1 of the Quebec Regulation respecting occupational health and safety (RSST, RLRQ, c. S-2.1, r. 13), part of Quebec Occupational Health and Safety Act, which came into effect on March 26, 2020, the TWAEV, STEL and Ceiling values for certain substances are now expressed in ppm. For these substances, the IRSST performed the conversion calculations to express these TWAEV, TWA and Ceiling values in mg/m3, which thus appears in its Sampling Guide for Air Contaminants in the Workplace (Guide d'échantillonnage des contaminants de l'air en milieu de travail ) and the associated Substance Data Sheets. However, it is imperative to refer to the values expressed in the RSST which are legally binding.