EVALUATING THE ACUTE DERMAL TOXICITY AND SKIN IRRITATION OF THE TEMEPHOS IMPREGNATED CELLULOSE NANOFIBER INTENDED FOR MOSQUITO LARVICIDE

Received 2022-12-17; Accepted 2023-02-12; Published 2023-06-06

Authors

  • Hazirah Pengiran Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, 13200 Kepala Batas, Pulau Pinang, Malaysia.
  • Jahangir bin Kamaldin Toxicology Department, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, 13200 Kepala Batas, Pulau Pinang, Malaysia.
  • Leo Bey Fen Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
  • Nurhidayah Sabri Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, 13200 Kepala Batas, Pulau Pinang, Malaysia.

DOI:

https://doi.org/10.22452/jummec.sp2023no1.20

Abstract

Cellulose nanofiber (CNF) derived from kenaf bast fiber has the potential to be used as a biodegradable and renewable larvicide nanocarrier due to its excellent physicochemical properties. However, acute dermal toxicity testing of CNF with high aspect ratios and fibrous morphology is limited even though its exposure to the skin is possible. Herein, this study aims to investigate the skin irritation effect and acute dermal toxicity of kenaf CNF (KCNF 2.3 % w/v) & kenaf CNF impregnated with temephos (KCNF+T 2.3 % w/v) following OECD test guideline 402. Female Sprague Dawley rats were exposed with KCNF 2.3 % w/v and KCNF+T 2.3 %w/v, respectively, at a dose level of 2000 mg (kg body weight)-1 for 24 hours followed by 14 days of observation for skin irritation effect, mortality, abnormal behaviours, and clinical signs of toxicity. Our result indicated that no skin irritation effect, treatment-related mortality, and abnormal behaviours in both exposed groups. However, KCNF+T 2.3 % w/v treated rats showed mild cholinergic signs of toxicity compared with the absence of clinical signs of toxicity in KCNF 2.3 % w/v treated rats. The KCNF 2.3 % w/v and KCNF+T 2.3 % w/v were non-skin irritants with the LD50 value > 2000 mg (kg body weight)-1 and therefore classified as non-hazardous chemicals of Category 5 according to the GHS system.

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Published

2023-06-06