Nalco 2593 Msds May 2026

Those tiny-sounding ingredients, MIT and CMIT, punch far above their weight: they are fast-acting broad‑spectrum biocides that destroy microbial cells by disrupting enzymes and membranes. That biochemical efficiency is why only a small fraction of the formulation is “active” while the rest acts as carrier and stabilizer. But the same mechanism that makes them lethal to microbes can make them irritating or sensitizing to humans and highly toxic to aquatic life—so the product demands respect and engineering controls, not casual splashing around.

Many people still search for “MSDS,” but under OSHA’s Hazard Communication Standard (HCS 2012) aligned with GHS revision 3 & 4, the document is now an SDS with 16 mandatory sections. If you have an old NALCO 2593 MSDS (pre-2015), you should replace it with the current SDS.

Key changes you will see in the new SDS for NALCO 2593:

Nalco 2593 is a liquid microbiocide used in industrial recirculating cooling-water systems to control bacteria, fungi and algae. Active ingredients listed in regulatory records are 5‑chloro‑2‑methyl‑4‑isothiazolin‑3‑one (CMIT) ~1.15% and 2‑methyl‑4‑isothiazolin‑3‑one (MIT) ~0.35%; the rest are inert ingredients. The product is registered as a potent biocide and carries strong hazard warnings. nalco 2593 msds

Action dictated by Section 6 & 12: Dike the spill, prevent entry into drain, absorb material, and dispose as hazardous waste if pH is <2. The SDS flags ecological toxicity, so you must notify environmental authorities.

Under the GHS classification system, the MSDS for NALCO 2593 generally highlights the following hazards:

| Hazard Class | Category | Statement | |--------------|-----------|------------| | Skin Corrosion/Irritation | Category 1B | Causes severe skin burns and eye damage | | Serious Eye Damage | Category 1 | Causes serious eye damage | | Specific Target Organ Toxicity (Single Exposure) | Category 3 | May cause respiratory irritation | Those tiny-sounding ingredients, MIT and CMIT, punch far

Signal Word: DANGER

Hazard Statements:

Precautionary Statements (abbreviated from MSDS): Nalco 2593 is a liquid microbiocide used in

⚠️ Note: NALCO 2593 is not classified as flammable, self-reactive, or an oxidizer. It also poses no acute oral toxicity (Category 5 or unclassified), but swallowing is still harmful due to corrosivity.

The MSDS provides strict, time-sensitive first-aid protocols due to the corrosive nature of NALCO 2593.

| Route of Exposure | Immediate Action | |------------------|------------------| | Inhalation | Remove to fresh air. If breathing is difficult, give oxygen. If stopped, perform artificial respiration. Seek medical attention if irritation persists. | | Skin contact | Remove contaminated clothing immediately. Rinse skin with plenty of water for at least 15–20 minutes. Wash clothing before reuse. Seek medical help for burns. | | Eye contact | Hold eyelids open and rinse cautiously with water for at least 30 minutes. Remove contact lenses if present. Immediate medical evaluation is required. | | Ingestion | Do NOT induce vomiting. Rinse mouth with water. If conscious, drink 1–2 glasses of water to dilute. Never give anything by mouth to an unconscious person. Seek emergency medical attention. |

Notes to physician: Symptomatic treatment. Corrosive injury may require esophagoscopy if ingestion occurred.