## Revised: 1/14/2004 

## UN1791, Hypochlorite solution, 8, PG III RQ component: sodium hypochlorite; RQ amount: 800 lbs

PRECAUTIONARY STATEMENTS: HAZARDS TO HUMANS AND DOMESTIC ANIMALS DANGER: CORROSIVE. MAY CAUSE SEVERE SKIN IRRITATION OR CHEMICAL BURNS TO BROKEN SKIN. CAUSES EYE DAMAGE. Do not get in eyes, on skin or on clothing. Wear goggles or face shield and rubber gloves (PVC or Nitrile) when handling this product. Wash after handling. Avoid breathing vapors. Vacate poorly ventilated areas as soon as possible. Do not return until odors have dissipated. ENVIRONMENTAL HAZARDS This pesticide is toxic to fish and aquatic organisms. Do not discharge effluent containing this product into lakes, streams, ponds, estuaries, oceans, or other waters 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. PHYSICAL AND CHEMICAL HAZARDS STRONG OXIDIZING AGENT: Mix only with water according to label directions. Mixing this product with gross filth such as feces, urine, etc., or with ammonia, acids, detergents or other chemicals will release hazardous gases irritating to eyes, lungs and mucous membranes. STORAGE AND DISPOSAL Store in a cool, dry area away from direct sunlight. In case of a spill, flood area with large quantities of water. Rinse empty container thoroughly with wa ter and either return empty container thoroughly with water and either return empty container to manufacturer or bury in an approved landfill. Product or rinsate that cannot be used should be diluted with water and disposed of in a sanitary sewer. Wastes resulting from the use of this product may be disposed of on site or at an approved waste disposal facility. Do not contaminate water, food, or feed by storage, or disposal. 

# DIRECTIONS FOR USE It is a violation of Federal Law to use this product in a manner inconsistent with its labeling. NOTE: This product degrades with age. Use a chlorine test kit and increase dosage as necessary to obtain the required level of available chlorine. For the control bacteria, algae and fungi, add this sodium hypochlor ite solution to tower basin, distribution box or some other point in the system to insure uniform mixing. DIRECTIONS FOR USE CONTINUED ON RIGHT SIDE PANEL 

# Nalco 7341
A MICROORGANISM CONTROL CHEMICAL ACTIVE INGREDIENT: Sodium hypochlorite ..........................................................................12.5% INERT INGREDIENTS.......................................................................87.5% TO TA L................................................................ ........................... 100.0%

EPA Reg. No. 1706

- 20001 EPA Est. No. 1744

- NH

- 1 EPA Est. No. 00550

- GA

- 001 EPA Est. No. 1706

- IL

- 1 (BP) EPA Est. No. 00550

- PA

- 003 EPA Est. No. 1706

- PA

- 1 (EL) EPA Est. No. 000813

- AZ

- 001 EPA Est. No. 1706

- WA

- 01 (VW) EPA Est. No. 000813

- CO

- 001 EPA Est. No. 1706

- CA

- 01 (CR) EPA Est. No 70411

- LA

- 1 EPA Est. No. 68708

- LA

- 1 (ST) EPA Est. No. 10897

- WA

- 1 Letter in () that matches first letter in batch number identifies the

establishment number. 

# KEEP OUT OF REACH OF CHILDREN 

# DANGER FIRST AID ú IF IN EYES: Hold eyes open and rinse slowly and gently with water for 15

- 20 minutes. Remove contact lenses, if present, after the first 5 minutes, then continue rinsing. Call a poison control center or doctor for treatment advice. ú IF SWALLOWED: Call a poison control center or doctor immediately for treatment advice. Have person sip a glass of water if able to swallow. Do not induce vomiting unless told by a poison control center or doctor. ú IF ON SKIN: Take off contaminat ed clothing. Rinse skin immediately with plenty of water for 15

- 20 minutes. Call a poison control center or doctor for treatment advice. ú IF INHALED: Move person to fresh air. If person is not breathing, call 911 or ambulances, then give artificial respir ation, preferably mouth

- to
- mouth, if possible. Call a poison control center or doctor for treatment advice NOTE TO PHYSICIAN: Probable mucosal damage may contraindicate the use of gastric lavage. Measures against circulatory shock, respiratory depression and convulsion may be needed. Have the MSDS with you when calling a poison control center or a doctor, or going for treatment.

SEE LEFT SIDE PANEL FOR ADDITIONAL PRECAUTIONARY STATEMENTS. Nalco Company 1601 West Diehl Road Naperville, IL 60563

- 1198 EM ERGENCY PHONE NO. (800) 424

- 9300 

### DI RECTIONS FOR USE (continued from left side panel): COOLING TOWER, EVAPORATIVE CONDENSER WATER, AND PULP AND PAPERMILL WATER SYSTEMS A. SLUG FEED METHOD Initial Dose: When the system is noticeably fouled, add appropriate amount of NALCO 7341 per 10,000 gallons of water in the system to obtain from 5 to 10 ppm available chlorine. Repeat until control is achieved. Badly fouled systems must be cleaned before treatment is begun. Subsequent Dose: When microbial control is evi dent, add appropriate amount of NALCO 7341 per 10,000 gallons of water in the system daily, or as needed to maintain control and keep the chlorine residual at 1 ppm. B. INTERMITTENT FEED METHOD Initial Dose: When the system is noticeably fouled, add appropri ate amount of NALCO 7341 per 10,000 gallons of water in the system to obtain 5 to 10 ppm available chlorine. Apply half (or 1/3, 1/4, or 1/5) of this initial dose when half (or 1/3, 1/4, 1/5) of the water in the system has been lost by blowdown. Badly fo uled systems must be cleaned before treatment is begun. Subsequent Dose: When microbial control is evident, add appropriate amount of NALCO 7341 per 10,000 gallons of water in the system to obtain a 1 ppm residual. Apply half (or 1/3, 1/4, or 1/5) of thi s initial dose when half (or 1/3, 1/4, 1/5) of the water in the system has been lost by blowdown. C. CONTINUOUS FEED METHOD Initial Dose: When the system is noticeably fouled, add appropriate amount of NALCO 7341 per 10,000 gallons in the system to obtain 5 to 10 ppm available chlorine. Badly fouled systems must be cleaned before treatment is begun. Subsequent Dose: Maintain this treatment level by starting a continuous feed of 1 oz. of NALCO 7341 per 1,000 gallons of water lost by blowdown to maintain a 1. 0 ppm residual. TREATMENT LEVEL CHART

METHOD Ounces NALCO 7341/10,000 Gallons Water

52

- 104 11 Slug Feed to obtain 5

- 10 ppm Subsequent Dose to maintain 1 ppm residual 52

- 104 11 Intermittent Feed to obtain 5

- 10 ppm Subsequent Dos e to maintain 1 ppm residual 52

- 104 Continuous Feed to obtain 5

- 10 ppm Subsequent Dose (per 1000 gallons) to maintain 1 ppm residual 1.0

NET CONTENTS SHOWN ELSEWHERE ON CONTAINER