Diff-Quik Stain is widely used in clinical and laboratory settings for rapid staining of cytological and histological specimens. It is especially valuable in providing quick assessment of cell morphology during fine needle aspirations, blood smears, and body fluid cytology. The stain differentiates cellular components effectively—nuclei stain blue to purple, cytoplasm ranges from pink to blue, and extracellular materials like collagen appear pink. Its fast staining protocol, typically completed within a minute, makes it ideal for intraoperative consultations where immediate evaluation is required. Diff-Quik is also used in veterinary medicine and microbiology for staining bacterial cultures and identifying microorganisms in smears. Due to its simplicity and speed, it supports prompt diagnostic decisions without the need for complex processing.