Phosphonates & salts
2-Phosphonobutane-1,2,4-tricarboxylic acid
CAS 37971-36-1
PBTC, 2-phosphonobutane-1,2,4-tricarboxylic acid (CAS 37971-36-1), is a liquid sequestering and calcium-carbonate scale-control ingredient for industrial water treatment and cleaning formulations. Review the 49.0–51.0% active-acid reference specification and test conditions. H2Q INC. handles U.S. sales, customer service, quotations and contracts. Share your grade, quantity and destination so the order terms can be confirmed.
Liquid · 49.0–51.0% active acid
Source: Jiyuan Qingyuan manufacturer TDS — PBTC. Routine manufacturer TDS supplied to H2Q on 28 October 2026. This is the receipt date, not a printed revision number. Confirm the selected grade and relevant batch COA before purchase.
| Parameter | Reference specification |
|---|---|
| Appearance | Water white to pale yellow liquid |
| Active acid | 49.0–51.0 % |
| Phosphorous acid as PO₃³⁻ | ≤ 0.5 % |
| Phosphoric acid as PO₄³⁻ | ≤ 0.2 % |
| pH1% solution | 1.5–2.0 |
| Density20°C | ≥ 1.270 g/cm³ |
| Iron as Fe | ≤ 10.0 ppm |
| Chloride as Cl⁻ | ≤ 10.0 ppm |
| Colour APHA (Hazen) | ≤ 50 |
Options and storage information listed in the manufacturer reference.
12 months
Indoors in a shaded, dry place, as stated in the manufacturer reference.
Confirm the current grade, packaging, storage period and supply terms for your order.
Include the oxidizing biocide and other formulation components in your technical inquiry.
Product identity and overview: Qingyuan official PBTC product page . Confirm the current grade-specific documents for your application.
FOR U.S. PROCUREMENT TEAMS
Comparing PBTC supplier options? Start with the exact grade, your application and delivery requirements.
H2Q INC. handles U.S. sales, customer service, quotations and sales contracts. Jiyuan Qingyuan Water Treatment Co., Ltd., China, handles manufacturing, research and development, and export procedures. Tell H2Q your grade and destination so we can review the order requirements.
H2Q’s role and business contact · Manufacturer information and evidence
Specify the supplied form, exact grade, content reporting basis and impurity limits that your purchasing specification requires. State your trial quantity or recurring demand, with units. Minimum order quantity is confirmed individually for the grade, package and destination; there is no single minimum across this catalog.
Review PBTC specifications. The reference tables do not establish current availability or an accepted order quantity.
PBTC shipments are dispatched from China.
Give your required delivery date, destination city and state, ZIP code or receiving port, and preferred delivery terms. H2Q confirms lead time, packaging, transport arrangements and delivery terms for each order in the quotation and sales contract. Qingyuan handles export procedures; import responsibilities must be agreed for the destination.
Availability and delivery timing are confirmed for the specific order; this page does not indicate U.S. inventory.
The manufacturer lists these reference packaging options for PBTC:
Review PBTC packaging and storage. Ask for confirmation of the package, labeling and shipping arrangement for your grade and destination. Confirm the package net weight in your quotation.
PLAN YOUR PRODUCT REVIEW
Compare the exact product and grade against your requirements before agreeing supply terms.
Also searched as: PBTC · PBTCA
When reviewing PBTC for calcium carbonate scale control, include hardness, alkalinity, pH and temperature. Identify any oxidizing biocide, its operating concentration and dosing pattern, together with the other treatment components.
PBTC is used as a sequestering ingredient in cleaning formulations. Share the target formulation pH, other ingredients, intended substrate and stability tests so the technical discussion reflects the finished product you plan to make.
Compare the current TDS coverage, chemical identities and content-reporting bases before preparing your purchasing specification. Document and grade differences do not establish interchangeable application performance.
Use the TDS for product review, the SDS for handling and regulatory review, and a relevant COA for batch-level checks.
Request PBTC documentsBoth abbreviations are used for 2-phosphonobutane-1,2,4-tricarboxylic acid, CAS 37971-36-1. The liquid reference TDS shown here specifies 49.0–51.0% active acid. Check the exact grade and reporting basis in the current TDS; an abbreviation alone does not define a supply specification.
Provide the biocide identity, concentration or residual range, dosing pattern, operating pH and temperature, and the other treatment ingredients. These conditions allow a focused compatibility review. The product name alone does not establish suitability for your complete treatment program.
This catalog entry describes a chemical ingredient. A finished treatment program depends on water chemistry, system materials and the functions required, including any additional scale, deposit or corrosion control. State whether you are purchasing an ingredient for formulation or reviewing a treatment application.
Send your required specification, intended use, quantity, preferred package and destination. Request the grade-specific TDS and identify the tests needed on a batch COA. Contact H2Q for the applicable SDS during supplier qualification or order review. Include your target timing so sample evaluation and order terms can be reviewed together.
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