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One Step

This page contains information on One Step for veterinary use.
The information provided typically includes the following:
  • One Step Indications
  • Warnings and cautions for One Step
  • Direction and dosage information for One Step

One Step

This treatment applies to the following species:
Manufacturer: Vedco

Epa Reg. No.


Active Ingredient(s)



Inert Ingredients


*From alpha-(p-nonylphenyl)-omega-hydroxypoly (oxyethylene)-iodine complex.

One Step Indications

Concentrated broad spectrum iodophor for use as a one step cleaner-disinfectant and no-rinse sanitizer.

Used as directed ONE STEP is effective in hard water (up to 400 ppm as CaCO3) and in 5% organic serum load against the following viruses, bacteria and pathogenic fungi: Polio1*, Vaccinia*, Herpes Simplex Type 1*, Influenza A2/Japan 305*, and Canine Parvovirus*, bactericidal against Salmonella cholerasuis, Staphylococcus aureus, Pseudomonas aeruginosa, and E coli; is fungicidal against Trichophyton mentagrophytes (the athlete's foot fungus).

For veterinary hospital use only.

One Step Dosage And Administration

It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.

Use Dilution Table:


Titratable Iodine

1 oz to 10 gal

12.5 ppm

1 oz to 5 gal

25 ppm

3 oz to 5 gal

75 ppm

1 oz to 1 gal

125 ppm

6 oz to 5 gal

150 ppm

Not for residential use.

The color of ONE STEP solution is proportional to the titratable iodine concentration. Prepare a fresh solution daily, or when there is a noticeable change in its rich color, or more often if the solution becomes diluted or soiled. Used as directed, ONE STEP is effective in hard water (up to 400 ppm CaCO3) and in 5% organic serum load against listed bacteria and pathogenic fungi.

ONE STEP Cleaning and Disinfecting: Prior to use in veterinary clinics, animal holding facilities, farm premises, kennels, pet shops and zoos: Remove all animals and feeds from premises, vehicles and enclosures. Remove all litter and manure from floors, walls, and all surfaces to be treated. Empty all troughs, racks and other feeding and watering appliances. Then proceed as directed below.

To Clean and Disinfect: Before applying disinfecting solution, food products and packaging materials must be removed from the room or carefully protected. Remove heavy soil deposits before applying the disinfecting solution. Using a solution of 3 ounces ONE STEP per 5 gallons of warm water (68°F, 20°C or warmer), immerse objects in disinfecting solution, or apply solution with a mop, sponge or brush. When appropriate, use a mechanical sprayer to produce coarse spray. Allow a 10 minute contact time with disinfecting solution. For efficacy against Canine Parvovirus, allow a 120 minute contact time; surface must remain wet. All food contact surfaces must be rinsed with potable water before reuse. Floors, walls and all other non-food contact surfaces may drain dry without rinsing.

Note: When mixing ONE STEP with cold water (as low as 41°F, 5°C), increase use to 6 oz per 5 gallons of water.

Before Rehousing Animals: Ventilate buildings, vehicles and other closed spaces. Do not house animals or use equipment until treatment absorbs, sets or dries. Thoroughly rinse all treated feed racks, mangers, troughs, automatic feeders, fountains and waterers with potable water before reuse.

Shoe Bath: Routine use of shoe bath sanitizers helps reduce the spread of disease causing organisms between poultry houses, farrowing houses, hog barns and other livestock buildings. Use 3 ounces of ONE STEP per 1 gallon of water. Place sanitizing solution in shallow plastic or stainless steel pans inside all entrances to poultry and livestock buildings. Scrape shoes outside doorway and stand in shoe bath for 30 seconds before entering building. Replace shoe bath daily or more often if solution becomes soiled.

Cleaning Milking Equipment and Bulk Tanks: Immediately after milking, flush milking equipment and utensils with lukewarm (100°F, 38°C) water to wash out all milk. Take apart milking machines and immerse air hoses, inflations, metal parts (except pulsator) and utensils in a solution containing 1 ounce of ONE STEP per 5 gallons of water. Brush all parts thoroughly. Drain completely, rinse with water and allow to air dry. After emptying bulk tanks, flush tanks thoroughly with 100°F (38°C) water to wash out all milk. Brush tanks thoroughly with a solution containing 1 ounce ONE STEP per 5 gallons of water. Allow wash solution to drain, rinse with water and air dry.

Sanitizing Milking Machines and Bulk Tanks: Before each milking, flush assembled milking machines and empty bulk tanks with a solution containing 1 ounce ONE STEP per 5 gallons of water. Allow a 1 minute contact time. Drain thoroughly and air dry before use.

Sanitizing Previously Cleaned Food Contact Surfaces: Sanitize previously cleaned and rinsed hard, non-porous surfaces such as glass, metal, plastic and porcelain with a solution containing 1 ounce of ONE STEP per 5 gallons of water. Spray or immerse equipment with sanitizing solution and allow 1 minute of contact time. Drain solution from equipment; do not rinse. ONE STEP used at 1 ounce per 5 gallons of water contains 25 ppm titratable iodine and does not require a final rinse with potable water in accordance with Federal Food Additive Regulation 178.1010.

Sanitizing Food-Grade Egg Shells: Coarse spray previously cleaned food-grade egg shells with a solution containing 1 ounce of ONE STEP Disinfectant per 5 gallons of water. Solution temperature should be warmer than the eggs, but not to exceed 130°F (53°C). Wet eggs thoroughly for 1 minute and allow to drain. A final potable water rinse is not required. Eggs should be reasonably dry before casing or breaking. Do not reuse solution to sanitize eggs.


Storage: Keep container closed when not in use. Do not store below 25°F or above 100°F for extended periods.

Prohibitions: Do not contaminate water, food or feed by storage or disposal. Open dumping is prohibited.

Pesticide Disposal: Pesticide wastes are acutely hazardous. Improper disposal of excess pesticide, spray mixture or rinsate is a violation of Federal Law. If these wastes cannot be disposed of by use according to label instructions, contact your State Pesticide or Environmental Control Agency, or the Hazardous Waste representative at the nearest EPA Regional Office for guidance.

Container Disposal: Triple rinse (or equivalent). Then offer for recycling or reconditioning, or puncture and dispose of in a sanitary landfill, or incinerate, or, if allowed by State and local authorities, burn container. If burned, stay out of smoke.

Environmental Hazards: This product is toxic to fish. Keep out of lakes, ponds or streams. Do not contaminate water by cleaning of equipment or disposal of wastes. Do not discharge effluent containing this product into lakes, streams, ponds, estuaries, oceans or other water unless in accordance with the requirements of a National Pollutant Discharge Elimination System (NPDES) permit and the permitting authority has been notified in writing prior to discharge. Do not discharge effluent containing this product to sewer systems without previously notifying the local sewage treatment plant authority. For guidance, contact your State Water Board or Regional Office of the EPA.

One Step Caution(s)

Precautionary Statements: Hazards to Humans and Domestic Animals: Danger: Corrosive: Causes irreversible eye damage. Harmful if swallowed. Do not get in eyes or on clothing. Avoid contact with skin. Wear goggles or face shield. Wash thoroughly with soap and water after handling. Remove contaminated clothing and wash before reuse.

Sold to veterinarians only.


Statement of Practical Treatment: In case of contact, immediately flush the eyes or skin with plenty of water for at least 15 minutes. For eyes, call a physician. If swallowed, drink promptly a large quantity of water. Call a physician immediately. Do not induce vomiting. Avoid alcohol. Get medical attention. Remove and wash all contaminated clothing before reuse.

Note to Physician: Probable mucosal damage may contraindicate the use of gastric lavage. Measures against circulatory shock, respiratory depression and convulsions may be needed.

Keep out of reach of children.


1 gallon.

Nac No.

Telephone:   816-238-8840
Toll-Free:   888-708-3326 (888-70VEDCO)
Fax:   816-238-1837
Every effort has been made to ensure the accuracy of the One Step information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the US product label or package insert.

Copyright © 2018 North American Compendiums. Updated: 2018-04-26