Biofriendly Substitutes for Xylene in Deparaffinization.

Area of Science:

• Histopathology
• Laboratory Science
• Toxicology

Background:

• Xylene, a common aromatic hydrocarbon in histopathology, poses biohazardous risks including carcinogenesis.
• There is a critical need for safer substitutes to minimize xylene usage in laboratory procedures.

Purpose of the Study:

• To assess the efficacy of 1.7% dishwashing solution, 95% lemon water, and 100% coconut oil as xylene substitutes.
• To compare these alternatives with xylene as deparaffinizing agents in hematoxylin and eosin (H&E) staining.

Main Methods:

• Fifteen paraffin-embedded tissue blocks were sectioned.
• Sections were stained using conventional H&E with xylene and xylene-free methods utilizing dishwashing solution, lemon water, and coconut oil.
• A single pathologist blindly scored slides based on nuclear/cytoplasmic staining, uniformity, clarity, crispness, and wax retention.

Main Results:

• All tested agents achieved adequate nuclear staining (100%).
• Dishwashing solution showed the highest cytoplasmic staining (100%), while all agents demonstrated comparable uniformity, clarity, and crispness.
• Adequate staining for diagnosis was achieved in 100% of xylene-treated sections, 93.33% with dishwashing solution, 86.66% with lemon water, and 80% with coconut oil.

Conclusions:

• Dishwashing solution, lemon water, and coconut oil are effective xylene substitutes for deparaffinization in H&E staining.
• These alternatives offer safer and cost-effective options for routine histopathological laboratory procedures.