Water treatment salt supplier | Coarse sea salt for softeners and brine systems

Who buys this grade

Water-treatment equipment suppliers, industrial softener operators, pool and spa distributors, electrochlorination plants, municipal utilities buying brine salt.

Specification

Target NaCl ≥99.0 % dry basis, insolubles ≤0.15 %, moisture ≤3 % after drainage and drying.
Coarse 2–8 mm fraction preferred for brine tanks; finer fractions available.
EN 973 conformity is tested per lot and stated only when confirmed.
No claims of tablet or pellet grade; those are produced from vacuum salt or compacted refined salt.

Each lot is tested for NaCl, insolubles and moisture before dispatch. Where a customer standard applies (for example EN 973 for regeneration salt in Europe), compliance is confirmed by an independent laboratory before we describe the product as meeting it.

Typical analysis and contract targets

Typical values from laboratory reports on washed salt (2016, 2026); targets are agreed per lot and confirmed by load-port inspection.
Parameter	Typical	Contract target	Method
Sodium chloride (NaCl)	98.7 – 99.4 %	≥ 98.5 % (dry basis)	ASTM E534
Moisture (H₂O, 110 °C)	1.1 % (2016 washed sample)	≤ 3.0 % ex-stockpile	ASTM E534
Water-insoluble matter	0.10 % (2016 washed sample)	≤ 0.20 %	ASTM E534
Calcium (Ca)	0.07 – 0.22 %	≤ 0.25 %	ASTM E534
Magnesium (Mg)	0.01 – 0.13 %	≤ 0.15 %	ASTM E534
Sulphate (SO₄)	0.30 – 0.67 %	≤ 0.50 % target, agreed per lot	ASTM E534
Anti-caking agent (YPS)	None in samples	50 – 100 mg/kg on request, subject to processing	Supplier declaration

Packaging and minimum order

25 kg bags on pallets and 1,000 kg big bags in 20-ft containers; bulk for large brine systems.

Minimum order: 200 t.

Documents with every shipment

Certificate of analysis per lot, EN 973 test report where requested, packing list, certificate of origin, bill of lading.

Questions buyers ask about water-treatment salt

Is the salt approved for drinking-water treatment?

Approval depends on the destination country and the treatment step. We supply lot test reports so the buyer's regulator or auditor can assess conformity; we do not state approval we have not obtained.

Can you supply softener tablets?

No. Tablets are compacted from refined salt. We supply coarse crystal salt suitable as feedstock for that process.

What is the minimum order?

200 t, typically eight to ten 20-ft containers of big bags, or one coaster for bulk brine-salt users.

Water-treatment salt