1. Introduction
The Diversey Virex II 256 is a broad-spectrum disinfectant cleaner designed for use in hospitals, nursing homes, schools, and other institutional and industrial settings. This product effectively cleans and disinfects hard, non-porous surfaces, helping to control the spread of various microorganisms. It is formulated to be effective against a wide range of bacteria, viruses, and fungi when used as directed. This manual provides essential information for the safe and effective use of this product.

This image displays two 1-gallon bottles of Diversey Virex II 256 Broad-Spectrum Disinfectant. The bottles are typically white or opaque with product labeling, indicating brand, product name, and key features.
2. Safety Information
READ ALL INSTRUCTIONS AND SAFETY DATA SHEET (SDS) BEFORE USE.
2.1 General Precautions
- Keep out of reach of children and pets.
- Do not mix with other chemicals, especially bleach, as hazardous gases may be produced.
- Use in a well-ventilated area.
- Avoid contact with eyes, skin, and clothing.
2.2 Personal Protective Equipment (PPE)
Always wear appropriate PPE when handling this product:
- Eye Protection: Safety glasses or goggles are recommended.
- Hand Protection: Chemical-resistant gloves (e.g., rubber or neoprene) are recommended.
- Skin Protection: Long sleeves and pants are recommended to prevent skin contact.
2.3 First Aid
- If in Eyes: Rinse immediately with plenty of water for at least 15 minutes. Remove contact lenses if present and easy to do. Continue rinsing. Get medical attention immediately.
- If on Skin: Wash thoroughly with soap and water. Remove contaminated clothing. If irritation persists, seek medical attention.
- If Swallowed: Do NOT induce vomiting. Rinse mouth with water. Drink 1-2 glasses of water. Never give anything by mouth to an unconscious person. Get medical attention immediately.
- If Inhaled: Move to fresh air. If breathing is difficult, administer oxygen. If not breathing, give artificial respiration. Get medical attention immediately.
3. Setup and Dilution
Virex II 256 is a concentrated product and must be diluted before use. The recommended dilution ratio is 1:256, meaning 1 ounce of product per 2 gallons of water.
3.1 Dilution Instructions
- Ensure you are wearing appropriate PPE (gloves, eye protection).
- Obtain a clean, empty container (e.g., spray bottle, mop bucket).
- Measure 1 fluid ounce (approximately 2 tablespoons) of Virex II 256 concentrate.
- Pour the measured concentrate into the container.
- Add 2 gallons of clean, cool tap water to the container.
- Gently mix the solution. Do not shake vigorously to avoid excessive foaming.
- Label the container with the product name, dilution ratio, and date of preparation. Diluted solutions should be used within 24 hours for optimal efficacy.
4. Operating Instructions
This product can be applied using a cloth, mop, sponge, or coarse spray device.
4.1 Cleaning and Disinfecting Hard, Non-Porous Surfaces
- Pre-clean: Remove gross filth and heavy soil from surfaces prior to disinfection. This can be done by wiping with a damp cloth or using a general cleaner.
- Apply Solution: Apply the freshly diluted Virex II 256 solution to the pre-cleaned surface. Ensure the surface remains visibly wet for the specified contact time.
- Contact Time: For general disinfection, allow the surface to remain wet for 10 minutes. Refer to the product label for specific contact times for different pathogens.
- Wipe Dry: After the contact time has elapsed, wipe the surface dry with a clean cloth or allow it to air dry. No rinsing is required for food contact surfaces when used at the recommended dilution.
4.2 Specific Uses
- Floors: Mop floors with the diluted solution. Ensure adequate wet contact time.
- Restrooms: Disinfect toilets, sinks, countertops, and other fixtures.
- Medical Equipment: Clean and disinfect non-critical medical equipment surfaces.
5. Maintenance and Storage
5.1 Storage
- Store in the original container in a cool, dry, well-ventilated area.
- Keep container tightly closed when not in use.
- Protect from freezing and direct sunlight.
- Do not store near food or feed products.
5.2 Disposal
- Container Disposal: Non-refillable container. Do not reuse or refill this container. Offer for recycling if available, or puncture and dispose of in a sanitary landfill, or by incineration.
- Product Disposal: Dispose of unused product in accordance with federal, state, and local regulations.
6. Troubleshooting
- Issue: Product does not appear to be effective.
Solution: Ensure correct dilution ratio (1:256) is used. Verify that surfaces are pre-cleaned before application. Confirm that the required contact time (typically 10 minutes) is maintained. Check the expiration date of the product. - Issue: Skin irritation after contact.
Solution: Immediately wash affected area with soap and water. Ensure proper PPE (gloves) is worn during handling. If irritation persists, seek medical attention. - Issue: Strong odor.
Solution: Ensure adequate ventilation in the area of use. The product has a characteristic odor; if it is unusually strong or different, ensure the product has not been contaminated or improperly stored.
7. Specifications
| Brand Name | VIREX |
| Model Number | 4332 Virex II 256 |
| Item Volume | 1 Gallon (per bottle) |
| Unit Count | 256.0 Fluid Ounces (per bottle) |
| Number of Items | 2 (2-Pack) |
| Specific Uses For Product | Floor, Hard Non-Porous Surfaces |
| Surface Recommendation | Porcelain, Vinyl, Painted Surfaces, Metal, Glass, Plastic |
| Contains Liquid Contents? | Yes |
| Package Dimensions | 12.2 x 8.8 x 8.4 inches; 18.05 Pounds |
| Date First Available | November 29, 2021 |
8. Warranty and Support
For specific warranty information or technical support regarding Diversey - 4332 Virex II 256 Broad-Spectrum Disinfectant, please contact Diversey customer service directly. Contact details can typically be found on the product label or the official Diversey website. Always refer to the manufacturer's official documentation for the most current warranty terms and support options.