Product Overview
Deionized water (CAS 7732-18-5) is water processed through ion exchange to strip out dissolved mineral ions — sodium, calcium, iron, copper — leaving a clear, odorless liquid suited to work where tap water introduces problems. Buyers also know it as demineralized water or purified water. It is the workhorse fluid for lab reagent preparation, analytical work, industrial cooling loops, and electronics cleaning, anywhere mineral residue or ionic contamination would foul a process. We offer it in pack sizes from 1 quart bottles up to 330 gallon totes, so a bench lab and a production floor can purchase from the same listing.
Why This Concentration
Deionized water is not sold by concentration the way acids and caustics are; the buying decision is about what has been removed, not what has been added. Ion exchange targets dissolved ionic species — the minerals that leave scale on heat-transfer surfaces, spot-deposit on rinsed parts, and interfere with analytical baselines. If your process fails on mineral deposits, conductivity drift, or ionic interference, deionized water is the fix. If your application is extremely sensitive — trace-level analysis, for example — evaluate whether an additional purification step downstream of DI water is warranted for your method; review the technical data sheet against your own spec before ordering. For general dilution, rinsing, cooling, and reagent make-up, DI water is the practical, cost-effective choice over tap water wherever controlled water purity matters.
Chemical Profile
Deionized water is a clear, odorless liquid — formula H2O, molecular weight 18.015, CAS 7732-18-5. It has a density of 1, is completely miscible in aqueous systems, and carries a vapor pressure of 23.75 mmHg. There is no color, no odor, and no visible difference from ordinary water; the distinction is what is no longer in it. That absence is the product: when the ions are gone, so are the scale, the spotting, and the conductivity they cause.
Industrial Applications
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HPLC mobile phase: a mobile-phase component in reversed-phase chromatography, where ionic contamination would distort separations of organic compounds.
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Spectroscopy solvent: a baseline solvent in UV-Vis work, where dissolved minerals would interfere with clean readings.
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Cooling systems: a heat-transfer fluid in machinery and equipment cooling, where mineral-free water prevents scale from building on heat-exchange surfaces.
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Reagent preparation: the dilution and make-up water for reagents in chemical analysis and formulation, keeping ionic background out of the result.
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Electronics manufacturing: rinse and cleaning water for electronic components, where tap-water minerals would deposit on boards and contacts.
Across all five, the job is the same: deionized water does its work by contributing nothing. In a lab it protects the measurement; on an industrial line it protects the surface. High mineral loads in ordinary water are the failure mode this product exists to remove.
Handling & Storage
Deionized water is not classified as hazardous under GHS based on available data (per the product's GHS classification), and it carries no signal word. The handling discipline here is about protecting the product, not the operator: DI water re-absorbs ions from whatever it touches. Store it in HDPE or glass containers to prevent leaching, keep containers closed to limit air exposure and recontamination, and keep it in a cool, dry area away from direct sunlight. Standard good practice — gloves, goggles, ventilated storage — applies as it does across any chemical handling area. Match your container draw-down to your usage rate: once opened, smaller containers limit the contamination window better than a part-empty drum.
Hazmat & Shipping
Deionized water is not regulated as a hazardous material for transport: it carries no UN number, no hazard class, and no packing group assignment (per 49 CFR 172.101), and no proper shipping name applies. Our team packs it with the same care as our regulated freight — sealed, upright, and protected — because for this product the risk in transit is contamination and leakage, not chemical hazard.
Documentation
A Safety Data Sheet ships with every order and is available in English, Spanish, French, and Japanese. A technical data sheet is available for spec review before you purchase, and a lot-specific Certificate of Analysis is available with your order — useful when your QC program requires traceability on incoming water. Request documents up front if your receiving process needs them on file before delivery.
Why Buy from Alliance Chemical
One listing covers the full use scale: 1 quart and 1 gallon bottles for the bench, 5 gallon pails and 15 or 55 gallon drums for the process floor, and 275 or 330 gallon totes for bulk consumption — all offered with SDS, TDS, and lot-specific COA support. Alliance Chemical has operated since 1998 and has served 50,000+ customers from our Taylor, Texas warehouse, packing and shipping industrial chemicals daily. Shipping and handling guidance on this page is reviewed by Andre Taki, DOT Hazmat Specialist.
