Water treatment
pH Regulators — Acid & Alkali Grades for Municipal WTP & Industrial ETP
FOB Black Sea / MENA · CFR/CIF worldwide on request
Indicative price
USD 123–150 / MT
Indicative range, firm quote on request
Key parameters
Full product details
Product overview
pH regulators are the acid and alkali chemicals that water treatment plants dose to hold process water within the narrow pH window where coagulants perform, disinfectants remain effective and corrosion stays under control. Our export portfolio covers both sides of the correction curve — sulfuric acid and hydrochloric acid for lowering alkalinity in high-pH raw water and reverse-osmosis permeate loops, and sodium hydroxide solution, hydrated lime and soda ash for raising pH ahead of alum or ferric coagulation and post-chlorination neutralization.
Acid grades ship at 93–98% H₂SO₄ or 31–33% HCl with iron and heavy-metal limits available to potable-water specification when municipal permits require certification. Alkali grades include membrane-cell 50% NaOH with chlorides capped at 50 ppm, hydrated lime Ca(OH)₂ at 90% minimum for lime-softening and sludge conditioning, and light soda ash for buffered alkalinity where rapid pH swing would destabilize coagulant flocs. Each lot is matched to the dosing point in your flowsheet — rapid-contact basins favour liquid acids and caustic; lime slakers and solids feeders suit hydrated lime and carbonate grades.
Typical buyers include municipal water-treatment authorities securing seasonal chemical inventory ahead of summer demand peaks, industrial effluent-treatment operators correcting pH in metal-finishing and food-processing discharge, desalination plants balancing permeate alkalinity before remineralization, and regional chemical distributors supplying MENA utility contractors on framework agreements. HS code 3824.99 (prepared water-treatment chemicals) or individual codes per active ingredient. MOQ from 24 MT on FOB, CFR or CIF terms.
Full specification
| Sulfuric acid (H₂SO₄) | 93–98%, iron 5 ppm max, density 1.83–1.84 g/cm³ |
| Hydrochloric acid (HCl) | 31–33%, iron 5 ppm max, free chlorine 0.5 ppm max |
| Caustic soda solution (NaOH) | 50% ± 1%, NaCl 50 ppm max, Fe 10 ppm max |
| Hydrated lime (Ca(OH)₂) | 90% min, 200 mesh 95% passing, moisture 2% max |
| Soda ash (Na₂CO₃) | 99% min light grade, iron 30 ppm max |
| Heavy metals (potable option) | As, Pb, Hg, Cd per WHO/local permit on request |
| Operating pH range | Correction band 5.5–9.5; finished water 6.5–8.5 typical |
| Appearance | Clear liquids (acids/caustic); white powder or granules (solids) |
| HS code | 3824.99 / 2807.00 / 2815.12 / 2825.90 / 2836.20 |
Loading ports & logistics
pH regulators span corrosive liquids and hygroscopic solids — each format demands dedicated handling at origin and discharge. We coordinate three principal delivery modes depending on parcel size and plant infrastructure.
ISO tank containers suit liquid acid and caustic campaigns from 24 MT upward at chlor-alkali and sulfuric acid terminals on the Black Sea and in the Eastern Mediterranean. Each 20-foot tank holds 20–24 MT net; nickel-lined or 316L stainless units are mandatory for 50% NaOH. IMDG Class 8 placarding, emergency response guide and tank cleanliness certificate accompany every shipment.
IBC totes and HDPE drums serve smaller municipal lots and remote industrial sites without dedicated tank unloading. One-thousand-litre IBC units stack two-high in 20-foot containers; 200 L drums palletized at 80 units per container deliver approximately 16 MT net. Acid-resistant drum linings and caustic-compatible closures are verified before stuffing.
Bagged solids — hydrated lime and soda ash — load in 25 kg PE-lined sacks or 1-ton FIBC bulk bags into 20-foot containers at 22–24 MT net, or as untagged bulk in vessel holds for parcels above 500 MT. CFR and CIF quotations add ocean or container freight and marine insurance to the FOB chemical price. Typical lead time 10–20 days from contract execution to loading window.
Packaging & documentation
Liquid regulators ship in ISO tanks, 1,000 L IBC totes or 200–250 L HDPE drums; solid grades in 25 kg bags or 1-ton FIBC — presentation quoted separately from the FOB pH regulator price. Each lot is accompanied by a mill certificate of analysis showing active-ingredient concentration, specific gravity, iron and chloride limits, plus a safety data sheet (SDS) per GHS, commercial invoice, packing list, bill of lading and certificate of origin.
IMDG Class 8 dangerous-goods declaration is mandatory on every liquid acid and caustic consignment. Potable-water heavy-metal certification and third-party inspection (SGS, Bureau Veritas or equivalent) at loading can be arranged on buyer request. Tank pre-wash survey and compatibility letter are included in the shipping instructions package for ISO tank parcels.
FAQ
Which pH regulator should a water treatment plant use to raise or lower alkalinity?
Raise pH with sodium hydroxide solution (50% NaOH) for rapid correction at coagulation and disinfection stages, hydrated lime Ca(OH)₂ where calcium hardness precipitation is acceptable, or soda ash Na₂CO₃ for buffered alkalinity in softening circuits. Lower pH with sulfuric acid H₂SO₄ for high-volume correction or hydrochloric acid HCl where sulfate addition must be minimized. We quote the grade matched to your raw-water chemistry and permit limits.
How are water treatment pH regulators shipped on export routes?
Liquid acids and caustic move in HDPE drums (200–250 L), IBC totes (1,000 L) or ISO tank containers (20–24 MT per unit) with IMDG Class 8 documentation. Hydrated lime and soda ash ship in 25 kg bags palletized into 20-foot containers or 1-ton FIBC bulk bags. FOB parcels from 24 MT suit container assembly at Black Sea and MENA chemical terminals; larger liquid campaigns load dedicated tankers.
What drives the indicative pH regulator price per tonne?
FOB quotations reflect active-ingredient concentration, potable-water heavy-metal certification, packaging format (drum versus ISO tank), and freight to your discharge port. Acid regulators track sulfur and chlorine feedstock costs at regional chlor-alkali and sulfuric acid plants; alkali grades follow membrane-cell electricity pricing. The USD 123–150/MT band covers current grade and presentation differentials; firm pricing is fixed at contract signing.
Related products
- Liquid Caustic Soda 50% — primary alkali for rapid pH correction at coagulation stages
- Hydrochloric Acid — chloride-based acid regulator where sulfate addition must be avoided
- Sodium Bicarbonate — mild buffering alkali for permeate and FGD pH control