Product Overview
pH-Ree Fall is a 30% phosphoric acid buffering solution (CAS 7664-38-2) built for process work where pH stability matters. Based on phosphoric acid — a triprotic acid with three dissociation steps — this solution resists pH swings when acids or bases enter the system, holding conditions steady across a wide operating window. It is offered in technical grade, the purity tier matched to industrial and process-scale operations where analytical-grade cost premiums are unnecessary.
Available to order in sizes from 1-quart bottles through 330-gallon totes, pH-Ree Fall serves water treatment operators, industrial process engineers who need a reliable buffer without overbuying concentration they will only dilute down.
Why This Concentration
At 30% w/w, this solution hits a practical middle ground. It is concentrated enough to deliver meaningful buffering capacity per gallon — you are not paying to ship water — but dilute enough that handling stays manageable with standard corrosive-liquid PPE and HDPE containers. Operators working with concentrated phosphoric acid (75–85%) face higher viscosity, more aggressive corrosion of contact surfaces and tighter PPE requirements. A 30% solution, by contrast, pours cleanly, mixes on contact with process water and sits in Packing Group III for transport rather than a more restrictive classification.
For pH adjustment and buffering work, 30% also means the solution is ready to dose directly into many process streams — water treatment loops, industrial rinse circuits — without a separate dilution step. If your operation consumes high volumes and you want to cut per-gallon freight cost, a more concentrated product may be worth the extra handling discipline. For most day-to-day buffering, 30% is the workhorse choice.
Chemical Profile
pH-Ree Fall is a clear, colorless, odorless liquid — it looks and pours like water but carries the corrosive character of a mineral acid solution. Its density is approximately 1.18 at 30% w/w and 20 °C, noticeably heavier than water, which matters when calibrating metering pumps or calculating vessel loads. The active compound is phosphoric acid (molecular formula H3O4P, molecular weight 97.995), registered under CAS 7664-38-2. Phosphoric acid is fully miscible with water at this concentration, so the solution integrates immediately into aqueous process streams with no emulsification or phase-separation concerns. Because the 30% aqueous solution is water-dominated, vapor pressure behavior tracks water rather than the acid itself — minimal acid vapor at ambient conditions, which simplifies ventilation planning compared to volatile acids like hydrochloric.
Industrial Applications
Phosphoric acid buffers occupy a specific niche: processes that need pH held steady against incoming acid or base loads without the drift problems of single-component pH adjusters. pH-Ree Fall fills that role across several sectors.
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Water treatment pH control.Municipal and industrial water treatment facilities use phosphoric acid buffers to stabilize pH during chemical dosing stages. The triprotic buffering action absorbs pH overshoots that a simple caustic or acid feed would create, reducing the operator adjustment cycle and keeping discharge within permit windows.
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Industrial process buffering.Metal finishing, surface preparation and chemical process lines depend on tight pH windows. pH-Ree Fall resists the pH creep caused by dragout, contamination, or batch-to-batch variation in feedstock chemistry, keeping process baths within specification longer between dumps.
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Technical-industry pH adjustment.Phosphoric acid is a recognized acidulant in technical manufacturing. Process operators use buffered phosphoric acid solutions to regulate acidity in production lines — controlling reaction rates, influencing texture and managing microbial conditions in process water.
Handling & Storage
pH-Ree Fall carries aDangersignal word (per the product's GHS classification). The two governing hazard statements:H314 — Causes severe skin burns and eye damage, and H290 — May be corrosive to metals(per the product's GHS classification). Treat this as what it is: a corrosive mineral acid solution.
Wear chemical-splash goggles, acid-resistant gloves (nitrile or butyl rubber) and a chemical-resistant apron at minimum. Face shields are warranted during transfer or drum-tapping operations where splashing is possible. Work in a ventilated area — while vapor pressure at 30% is low, enclosed spaces can accumulate mist during agitation or heated operations.
Store in HDPE, polypropylene, or glass containers. Carbon steel, aluminum and most common metals will corrode on contact — the H290 statement is not theoretical. Keep containers sealed, upright and away from strong bases and oxidizing agents. A cool, dry storage area out of direct sunlight extends shelf life and prevents pressure buildup. Secondary containment is standard practice for drum and tote quantities.
Hazmat & Shipping
pH-Ree Fall ships as a regulated hazardous material under DOT and IATA frameworks. The governing classification:
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UN Number:UN1805 (per 49 CFR 172.101)
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Proper Shipping Name:PHOSPHORIC ACID SOLUTION (per 49 CFR 172.101)
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Hazard Class:8 — Corrosive (per 49 CFR 172.101)
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Packing Group:III (per 49 CFR 172.101)
Packing Group III designates the lowest severity tier within Class 8, which affects packaging requirements and carrier handling protocols. All shipments leave our Taylor, TX warehouse with proper hazmat documentation, markings and placarding as required. Content reviewed by Andre Taki, DOT Hazmat Specialist.
Documentation
A Safety Data Sheet (SDS) ships with every order, available in English, Spanish, French and Japanese. A Technical Data Sheet (TDS) provides detailed product specifications beyond what the SDS covers. Lot-specific Certificates of Analysis (COA) are available on request, documenting the analytical results for your specific shipment. If your facility requires documentation in advance of delivery for EHS review, contact us and we will send the packet ahead of the shipment.
Why Buy from Alliance Chemical
pH-Ree Fall is available to order in sixteen size configurations — from single quarts for bench trials through 330-gallon totes for continuous-feed process work — so you are not forced into a size that does not match your consumption rate. Alliance Chemical has served over 55,000 customers since 1998, operating from our warehouse at 204 S Edmond St, Taylor, Texas 76574. Every corrosive shipment is classified, packaged, documented and labeled by our hazmat shipping team — this product page and its shipping guidance were reviewed by Andre Taki, DOT Hazmat Specialist (USDOT Registration 2188383).
