Buy Synthetic (Artificial) Sea Water Online from Leading UK Chemical Suppliers

Synthetic sea water (ASTM D1141-98) is used to simulate the theoretical content of natural sea water. Also known as artificial sea water, it is a solution of dissolved mineral salts that are found in the sea but has the advantage of being reproducible.

Chemical name: Synthetic Sea Water (ASTM D1141-98 formulation)

Synonyms: Artificial Sea Water, Simulated Seawater Solution

Appearance: Clear, colourless liquid

Odour: Odourless

pH (approximate): 8.0 ± 0.2 at 25°C

Density: ~1.025 g/cm³

Salinity: ~35 g/L (similar to natural seawater)

Solubility: Fully miscible with water

Main components: NaCl, MgCl₂, Na₂SO₄, CaCl₂, KCl, NaHCO₃, KBr, SrCl₂, H₃BO₃

Synthetic sea water maintains consistent quality and composition regardless of environmental changes, making it an excellent choice for repeatable experimental and industrial testing.

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What Is Synthetic Sea Water Used For?

Our customers use synthetic sea water for a number of applications. For example, it may be used for laboratory and scientific applications such as analysis and testing.

Another common use is to test the resistance of a substance from sea water without the need to actually go to sea. Substances could include protective coatings, paints, metals, plastics and resins. Artificial sea water is frequently used in research and development applications.

Other applications include:

• Corrosion and material testing – Assessing the engineering durability of coatings, paints, and metals exposed to marine environments
• Product development – Testing marine-grade plastics, composites, and sealants for long-term resistance to saltwater exposure
• Research and analysis – Supporting marine biology, chemical, and environmental studies under repeatable laboratory conditions
• Calibration and reference solutions – Providing a standard medium for instruments and experiments that require a seawater-like environment
• Aquatic simulation and testing – Used in aquaculture systems, oceanographic research, and bioassay development where seawater quality must remain consistent

Safety & Storage Recommendations

While synthetic sea water is non-toxic and non-flammable, proper storage and handling help maintain product quality and integrity.

• Storage conditions – Store in a sealed container in a cool, dry place away from direct sunlight or contamination sources
• Temperature stability – Maintain at ambient room temperature (10–25°C)
• Container materials – Suitable for use with HDPE, polypropylene, or glass containers
• Avoid contamination – Do not mix with other chemicals or solutions to preserve composition accuracy

Always refer to the product’s Material Safety Data Sheet (MSDS) before use.

Why Order From ReAgent?

ReAgent has been a leading UK chemical supplier for almost 50 years. With accreditation to a number of ISO Standards, as well as a 100% quality guarantee on every product, we have the knowledge and experience to handle all of your business needs.

You can buy synthetic sea water – also known as artificial sea water – from our online chemical shop in 25L containers and 1,000L IBCs. Order online today for nationwide next-day delivery and discounts on bulk orders.

We also have extra, industry-leading services available on all products, including personalised labelling, customisable packaging and the choice of specific pack sizes for chemical solutions.

On top of this, we strive to offer all our customers a friendly service. Our products are backed by a 100% quality guarantee so that you can relax and buy with confidence.Place your order online today, or contact our technical sales team for more information. We’ll be happy to help you before, during and even after your purchase.