Nalco 77352 - Msds

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Notice Regarding "MSDS" vs. SDS: Under the Globally Harmonized System (GHS), Material Safety Data Sheets (MSDS) have been replaced by Safety Data Sheets (SDS).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.

Section 4: Composition / Information on Ingredients

While the exact proprietary formulation is confidential, the SDS for Nalco 77352 will list hazardous ingredients above their reporting thresholds. Typical components include:

| Chemical Name | CAS Number | Typical % (Range) | Function | |---------------|------------|-------------------|-----------| | Phosphoric acid, (1-hydroxyethylidene)bis- (HEDP) | 2809-21-4 | 10-30% | Corrosion inhibitor | | Phosphonic acid, (nitrilotris(methylene))tris- (ATMP) | 6419-19-8 | 5-15% | Scale inhibitor | | Acrylic copolymer | Proprietary | 5-20% | Dispersant | | Sodium hydroxide (pH adjuster) | 1310-73-2 | 1-5% | Corrosive potential | nalco 77352 msds

Note to industrial hygienists: The exact percentages are trade secrets. However, the SDS must disclose any ingredient classified as hazardous and its approximate concentration.

Section 13: Transport Information

Proper shipping name per DOT/IMDG/IATA.

| Parameter | Information | |-----------|-------------| | UN Number | UN3266 (Corrosive liquid, basic, inorganic, n.o.s.) | | Proper Shipping Name | Corrosive liquid, basic, inorganic, n.o.s. (contains sodium hydroxide) | | Hazard Class | 8 (Corrosive) | | Packing Group | III (lowest hazard for corrosives) | | Marine Pollutant | No (but check state-specific rules) |

Special provisions: Do not ship with foodstuffs. Use UN-approved 1H1 (plastic) drums or IBCs. Important Notice Regarding "MSDS" vs

Section 3: First-Aid Measures – Immediate Actions

The MSDS provides a clear, step-by-step first-aid protocol. Time is critical, especially with eye exposure.

Section 12: Toxicological Information

The MSDS for Nalco 77352 provides acute toxicity data (typically based on component testing): Section 4: Composition / Information on Ingredients While

Acute oral toxicity (LD50): > 2000 mg/kg (rat) – low toxicity if ingested, but corrosive damage is the primary concern.
Acute dermal toxicity (LD50): > 2000 mg/kg (rabbit)
Acute inhalation toxicity (LC50): > 5 mg/L (rat) – mist is irritating.
Skin corrosion: Causes irreversible damage at site of contact.
Eye damage: Causes severe, potentially permanent damage.
Sensitization: Not a skin sensitizer.
Carcinogenicity: None of the components are listed as carcinogens by IARC, NTP, or OSHA.

13. Disposal Considerations

Dispose of contents/container in accordance with local, regional, and national regulations.
Do not dispose of in sewers or bodies of water.
Empty containers should be rinsed and recycled or disposed of as hazardous waste depending on residue.

Section 1: Product Identification and Composition

Section 13: Ecological Information

Ecotoxicity: Toxic to fish, algae, and aquatic invertebrates. EC50 (Daphnia magna) = 10-100 mg/L.
Persistence and degradability: Phosphonates are considered poorly biodegradable but may hydrolyze under UV light.
Bioaccumulation: Low potential (log Kow < 3).
Mobility in soil: High due to water solubility.

Environmental warning: Do not discharge into natural waters without pretreatment. Many jurisdictions require a chemical management plan for phosphonate-containing products.