NALCO 77352 is a broad-spectrum, non-oxidizing biocide designed to control microbiological growth in industrial water systems, including cooling towers, process water, and brewery pasteurizers. It is a liquid blend of isothiazolin-3-one active agents, typically appearing colorless to light yellow with a pungent odor. Hazard Identification
This product is classified as a corrosive chemical and a skin sensitizer.
Physical Hazards: Can cause irreversible eye damage and severe skin burns.
Health Hazards: Harmful if swallowed or inhaled. Prolonged exposure may cause allergic skin reactions.
Environmental Hazards: Highly toxic to aquatic life with long-lasting effects. Composition & Chemical Properties Active Ingredients
5-Chloro-2-methyl-4-isothiazolin-3-one (1–5%), 2-Methyl-4-isothiazolin-3-one (0.1–1%) Hazardous Additives Magnesium Nitrate (1–5%) pH (Neat) 3.0 – 5.0 (Acidic) Density 1.01 – 1.03 kg/L Solubility Complete in water Handling and First Aid
Always refer to the official Ecolab SDS portal for the most current safety documentation. Safety Data Sheets - SDS - MSDS - Ecolab
NALCO 77352 is a non-oxidizing biocide primarily used in industrial water systems to control the growth of bacteria, algae, and fungi. 🛡️ Critical Safety Overview
This product is classified as corrosive and poses significant health risks if handled improperly. Key hazards include:
Irreversible eye damage: Contact can cause permanent blindness.
Skin burns: Corrosive to living tissue; causes severe chemical burns.
Respiratory hazard: Harmful if inhaled; may cause allergic respiratory reactions.
Aquatic toxicity: Extremely harmful to marine and freshwater life; must not be discharged into the environment. 🔬 Composition & Chemical Properties
The effectiveness of NALCO 77352 stems from its active blend of isothiazolinones.
Active Ingredients: A blend of Isothiazolin-3-one agents (specifically Methylchloroisothiazolinone and Methylisothiazolinone). Form: Liquid. Color: Colorless to light yellow. pH Level: Acidic (typically 3.0 – 5.0). Solubility: Completely soluble in water. ⚙️ Industrial Applications
It is favored for systems where traditional oxidizing biocides (like chlorine) might cause corrosion or lose efficacy. nalco 77352 msds
Cooling Towers: Prevents biofouling in open and recirculating systems.
Closed Loops: Safe for systems containing copper as it does not contain copper-based stabilizers.
Process Water: Used in air washers and brewery pasteurizers to maintain system hygiene.
Heat Exchangers: Maintains heat transfer efficiency by preventing microbial slime buildup. 🦺 Handling & Storage Protocols
According to the NALCO 77352 Safety Data Sheet, strict protocols must be followed:
PPE Requirements: Wear chemical-resistant gloves, goggles, face shields, and protective clothing.
Ventilation: Use only in well-ventilated areas to avoid vapor buildup.
Storage: Keep containers tightly closed in a cool, dry place. Ensure all containers are clearly labeled.
Disposal: Waste must be treated as hazardous. Consult the Ecolab SDS portal for regional disposal regulations. 🚑 Emergency First Aid
Eye Contact: Rinse immediately with water for at least 15 minutes; seek medical attention instantly.
Skin Contact: Remove contaminated clothing and wash skin with soap and water for 15 minutes.
Inhalation: Move the victim to fresh air; if breathing is difficult, provide oxygen.
Ingestion: Do not induce vomiting; drink a few glasses of water and contact a poison control center immediately.
If you are writing a technical essay, I can help you expand on the chemical mechanism of isothiazolinones or the environmental impact of biocide discharge. Which area should we focus on?
Story:
Tom was a water treatment plant operator responsible for ensuring the safe and efficient treatment of wastewater in his community. One day, he was tasked with handling a new chemical shipment, Nalco 77352, which was a type of water treatment polymer used to improve the clarification and dewatering of wastewater.
Before starting to work with the chemical, Tom knew he had to review the Material Safety Data Sheet (MSDS) for Nalco 77352, now known as the Safety Data Sheet (SDS). The SDS provided critical information on the chemical's composition, potential hazards, and safe handling procedures.
The Challenge:
While reviewing the Nalco 77352 SDS, Tom noticed that the document listed several potential hazards associated with the chemical, including skin and eye irritation, respiratory problems, and environmental concerns. Tom realized that he needed to take extra precautions to ensure his safety and the safety of his colleagues when handling the chemical.
The Solution:
Tom took the following steps to ensure safe handling of Nalco 77352:
The Outcome:
By taking the time to review the Nalco 77352 SDS and following safe handling procedures, Tom and his colleagues were able to handle the chemical safely and effectively. They successfully treated the wastewater, and the community's waterways were protected from potential harm.
MSDS/SDS Information:
For reference, here is some general information about Nalco 77352:
SDS Availability:
The Nalco 77352 SDS can be obtained from the manufacturer's website (Ecolab) or by contacting their customer service department. It's essential to review the SDS regularly to ensure you have the most up-to-date information on the chemical's properties and safe handling procedures.
NALCO 77352 broad-spectrum, non-oxidizing biocide primarily used to control microorganisms in industrial water systems like cooling towers and brewery pasteurizers. Because it is copper-free, it is often chosen for closed-loop systems where copper accumulation is a concern. turquoise-az.com Key Safety & Chemical Features According to the NALCO 77352 Safety Data Sheet Product Overviews , the product has the following critical profiles: Hazard Profile : Classified as GHS Category 2/2A for skin and eye irritation. It is a known skin sensitizer and can cause allergic reactions. Active Ingredients : Typically contains a mixture of Isothiazolinones
(specifically 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one), Magnesium Nitrate, and Magnesium Chloride. Physical Properties Appearance : Yellow to colorless liquid with a pungent odor. : Highly acidic, typically ranging from 2.0 to 5.0 Solubility : Completely soluble in water. Environmental Impact toxic to aquatic life
(LC50 for rainbow trout is approx. 12 mg/l) and harmful with long-lasting effects. files.dep.state.pa.us Safe Handling & Storage Personal Protective Equipment (PPE) nitrile or butyl rubber gloves Wore personal protective equipment (PPE) : Tom put
, safety goggles, and a face shield. For large-scale handling, a chemical-resistant suit is recommended. Material Compatibility Compatible : PVC, Polyethylene (PE), Teflon, and Stainless Steel 316L.
: Aluminum, Brass, and Carbon Steel, as the neat product can corrode these materials.
: Store in original, tightly closed containers in a cool, well-ventilated area. It is recommended to use the product within 6 to 12 months
For the most official and site-specific version, you can request a direct copy through the Ecolab SDS Request Form dosage recommendations for a cooling system, or do you need help identifying compatible pump materials NALCO® 77352NA
PHYSICAL AND CHEMICAL PROPERTIES. ... SPECIFIC GRAVITY 1.02 @ 60 °F / 15.5 °C DENSITY 8.5 lb/gal SOLUBILITY IN WATER Complete pH ( files.dep.state.pa.us NALCO 77352 Safety Data Sheet | PDF - Scribd
The MSDS relies on analog data since the mixture itself may not have been fully animal-tested.
| Route | Effect | |-------|--------| | Acute oral (rat) | LD50 > 5,000 mg/kg (low toxicity) | | Acute dermal (rabbit) | LD50 > 2,000 mg/kg (mild to moderate irritant) | | Eye irritation (rabbit) | Corrosive – severe, irreversible damage | | Skin sensitization | Unlikely to cause allergic skin reaction | | Carcinogenicity | None listed (not IARC, NTP, or OSHA regulated) |
Chronic Effects: Repeated skin exposure may cause dermatitis due to defatting action. No evidence of reproductive toxicity or mutagenicity.
Nalco 77352 is typically dosed into the feedwater line or deaerator storage section of a boiler system.
Date: October 26, 2023 Subject: Safety Data Review and Hazard Assessment for NALCO 77352 Prepared By: [Your Name/Department] Status: Draft
The NALCO 77352 MSDS is not just a compliance document; it is a risk management tool. Understanding its sections — from first-aid measures (Section 4) to ecological toxicity (Section 12) — empowers your workforce to handle the chemical safely and responsibly.
Key final reminders:
By treating the MSDS as a living document — not a binder on a shelf — you protect your personnel, your equipment, and the environment while harnessing the full performance benefits of NALCO 77352.
Disclaimer: This article is for informational purposes only and does not replace the official NALCO 77352 Safety Data Sheet. Always refer to the most current SDS provided by Nalco Water/Ecolab for specific safety procedures, regulations, and emergency response protocols. Chemical formulations may change without notice.
Important Notice Regarding "MSDS" vs. SDS: Under the Globally Harmonized System (GHS), Material Safety Data Sheets (MSDS) have been replaced by Safety Data Sheets (SDS). Regulatory bodies like OSHA (in the US) and ECHA (in the EU) now require the 16-section SDS format. Therefore, while this report references historical MSDS data, it is structured as a modern SDS compliance report. The Outcome: By taking the time to review
Note to physicians: Product is corrosive. Endoscopic examination may be necessary. Avoid gastric lavage if significant esophageal corrosion is suspected.
