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2-Phosphonobutane -1,2,4-Tricarboxylic Acid, Sodium salt (PBTC•Na4)

PBTC·Na4 (Sodium Salt of PBTC) — PBTC·Na4 is the neutralized sodium salt of PBTC, a high-stability scale and corrosion inhibitor for high-temperature, high-pH and high-hardness cooling water needing a low-acidity feed.

Key facts: CAS 40372-66-5 · molecular formula of · typical dosage 1–15 ppm · supplied as a liquid in 25 kg & 200 kg drums and 1000 kg IBC totes. Manufactured factory-direct by VCYCLETECH — an ISO 9001/14001/45001-certified water-treatment chemical manufacturer in Shanghai, China (since 2013), with a COA on every batch, free samples and OEM/ODM available.

2-Phosphonobutane -1,2,4-Tricarboxylic Acid, Sodium salt (PBTC•Na4) is a very effective scale inhibitor used in industrial applications. It has a CAS No. of 40372-66-5 and a molecular formula of C7H7O9P•Na4 with a molecular weight of 358. PBTC•Na4 can improve the solubility of zinc salt and has good chlorine oxidation tolerance and thermal stability. It is a 41% aqueous solution with low phosphorus content. PBTC•Na4 is an ideal choice for industrial applications where scale inhibition is important.

Product Description

CAS No. 40372-66-5

Molecular Formula: C7H7O9P•Na4       Molecular weight: 358

Structure:

2-Phosphonobutane -1,2,4-Tricarboxylic Acid, Sodium salt (PBTC•Na4)

Properties:

PBTC•Na4 is an effective scale and corrosion inhibitor with a low content of phosphoric. Its unique structure, containing phosphonic acid and carboxylic acid groups, gives it superior scale inhibition properties even under high temperatures. This makes it far more effective than organophosphates. PBTC•Na4 can also improve the solubility of zinc salt, has good chlorine oxidation tolerance, and provides excellent composite synergy. It is also easy to deliquesce in its solid state.

Specification:

temsIndex
AppearanceColorless to yellowish transparent liquidWhite crystal powder
Active content (as PBTCA, % )30.0 min64.0 min
Active content (as PBTC•Na4, %)40.0 min85.0 min
Total phosphoric acid(PO43-%, )10.5 min22.5 min
Fe, mg/L-20.0 max
Density (20℃) g/cm31.35 min-
PH (1% water solution)9.0-12.04.0-6.0

Usage:

PBTC•Na4 is a highly effective composite scale and corrosion inhibitor that is widely used. It is an excellent stabilizer for zinc salt and can be used in high-temperature, hardness, alkaline, and high-concentration environments. When combined with other water treatment chemicals such as zinc salt, copolymer, organophosphine, and imidazole, PBTC•Na4 provides exceptional performance as a chelating agent and metal detergent.

Package and Storage:

Liquid

  • 200L plastic drum
  • IBC (1000L)
  • Customizable according to customer requirements
  • Suitable for storage in shady rooms and dry places for up to 10 months

Solid

  • 25kg/bag
  • Customizable according to customer requirements
  • Suitable for storage in shady rooms and dry places for up to 1 year

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PBTC·Na4 — Frequently Asked Questions (FAQ)

What is PBTC·Na4 (Sodium Salt of PBTC) used for?

PBTC·Na4 is the neutralized sodium salt of PBTC, a high-stability scale and corrosion inhibitor for high-temperature, high-pH and high-hardness cooling water needing a low-acidity feed.

What is the recommended dosage of PBTC·Na4?

PBTC·Na4 (Sodium Salt of PBTC) is typically dosed at 1–15 ppm. The exact dose depends on water quality, temperature and the overall treatment program — VCYCLETECH provides a tailored dosing recommendation.

Is VCYCLETECH a manufacturer of PBTC·Na4?

Yes. VCYCLETECH is a China-based manufacturer of PBTC·Na4 (Sodium Salt of PBTC), supplying PBTC·Na4 factory-direct with stable quality, competitive prices and full technical support, plus OEM/ODM and private-label packaging.

What packaging and MOQ are available for PBTC·Na4?

PBTC·Na4 is supplied in 25 kg drums, 200 kg drums and 1000 kg IBC totes (bulk on request). The typical MOQ is 1 metric ton; trial/sample orders and custom OEM/private-label packaging are available.

Can I get a free sample and COA of PBTC·Na4?

Yes. VCYCLETECH provides free PBTC·Na4 samples and a Certificate of Analysis (COA) with every batch, plus an SDS on request. Email sales@vcycletech.com to request a sample, COA or quotation.
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