1. Chemical Identity and Physical Properties

Chloramine-B — systematically named sodium N-chlorobenzenesulfonamide — is an N-chloro compound in which a chlorine atom is covalently bonded to the nitrogen of benzenesulfonamide. Its registry number, CAS 127-52-6, is the primary identifier used in regulatory documents, Safety Data Sheets, and procurement specifications worldwide.

The trihydrate crystal form is the dominant commercial grade. The alkaline pH of a freshly prepared solution (9–11) slows the release of hypochlorous acid (HOCl), which in turn is responsible for the compound's characteristic slow-release disinfection profile — a critical advantage over faster-reacting but less stable disinfectants such as sodium hypochlorite.

2. Mechanism of Antimicrobial Action

Chloramine-B exerts its biocidal effect through two complementary pathways:

2.1 Oxidative Pathway

In aqueous solution, the N–Cl bond undergoes hydrolysis to release HOCl and the parent sulfonamide anion. HOCl is a potent oxidant (standard reduction potential E° ≈ +1.48 V) that rapidly oxidises thiol groups, iron-sulfur clusters, and other redox-active sites in microbial proteins and nucleic acids, disrupting essential enzymatic functions.

2.2 Direct N-Chloro Transfer

At near-neutral pH, intact Chloramine-B molecules can directly chlorinate exposed amino, imino, or thiol groups on cell-surface proteins without prior hydrolysis. This direct route gives Chloramine-B measurable activity even at relatively low free-HOCl concentrations, explaining its efficacy in buffered or slightly alkaline environments such as municipal drinking water.

3. Quality Specifications at a Glance

Jinli Chemical's Chloramine-B is manufactured to the following checkpoint specifications, which are routinely verified by in-house QC and third-party laboratories:

4. Industrial and Commercial Applications

The broad concentration range underlines one of Chloramine-B's most commercially valuable traits: dose-dependent versatility. Low concentrations protect drinking-water residuals without imparting unacceptable taste or odour; elevated concentrations deliver the sporicidal and viricidal activity required in critical healthcare environments.

5. Chloramine-B vs. Competing Chlorine Donors

For a complementary product, Chloramine-T (CAS 7080-50-4) — also manufactured by Jinli Chemical — shares many stability benefits but carries a tolyl rather than phenyl group, altering its solubility profile and making it preferable in certain veterinary and analytical applications.

6. Storage, Handling, and Safety Essentials

Chloramine-B is classified as an oxidising solid. Its safe use requires straightforward but non-negotiable precautions:

7. Environmental and Regulatory Profile

A defining environmental advantage of Chloramine-B is its low potential to generate regulated disinfection by-products (DBPs). Unlike free chlorine (hypochlorite), which reacts readily with natural organic matter (NOM) to produce trihalomethanes (THMs) and haloacetic acids (HAAs) at concentrations that can exceed WHO guideline values, Chloramine-B produces these by-products at substantially lower rates.

Regulatory bodies in the EU, USA, and China have progressively tightened DBP thresholds in drinking water, creating strong market incentives for chloramine-based disinfection strategies. Chloramine-B's benzenesulfonamide backbone degrades microbiologically in activated-sludge wastewater treatment, limiting environmental persistence compared to highly brominated or fluorinated alternatives.

8. About the Manufacturer: Jiaxing Jinli Chemical Co., Ltd.

Jiaxing Jinli Chemical Co., Ltd. was established in 2002 and relocated in 2011 to the Zhejiang Province Zhapu Economic Development Park — located on the north bank of Hangzhou Bay, 105 km from Shanghai. The facility covers 22,000 m² and reaches an annual output of 19,000 tonnes across its product portfolio.

The company holds ISO 9001, ISO 14001, and ISO 45001 certifications, reflecting its parallel commitments to product quality, environmental stewardship, and occupational health. Jinli Chemical has been recognised as a National High-Tech Enterprise and maintains active industry–university–research cooperation with Zhejiang University of Technology and Jiaxing University.

Beyond the Disinfector Series, Jinli Chemical produces forming and blowing agents, plasticisers, and chemical intermediates — making it a versatile partner for formulators and distributors seeking a single, reliable source. Products are exported to the USA, EU, South Korea, Japan, and Southeast Asia.

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