Chloramine-T

CAS 127-65-1

Benzenesulfonamide, N-chloro-4-methyl-, sodium salt (1:1)

U.S. production volumes are classified as confidential business information.

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import value, 2024$2.0B

Top sourceIreland 63%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 293590 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential

These shares come from HS customs code 293590, which covers 182 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

IE 63%IrelandSG 14%SingaporeIN 7%IndiaCN 7%ChinaCH 2%Switzerland

Portugal
Spain
Italy
Austria
Israel
Hungary
Canada
South Korea
Netherlands
Finland
Poland
Indonesia
Ukraine
Mexico
South Africa
Croatia
Greece
Taiwan
Hong Kong

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Iofina Chemical

Why It Matters

Sectors

Agriculture

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

•Preservative in Agriculture, Forestry, Fishing and HuntingProcessing as a reactant

Vendor Pricing

$1.25/gAstaTech, Inc

CountryUnited States

Pack$125.00 / 100 g

Purity95%

Vendors2 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

1 more vendor

Vendor	Country	$/g	Pack	Purity
Molnova	China	$45.00	1 g	99%

Chemical Identity

CAS127-65-1

PubChem CIDNot recorded

DTXSIDDTXSID6040321

FormulaC7H7ClNNaO2S

Mol. Weight227.64 g/mol

SMILES[Na+].CC1=CC=C(C=C1)S(=O)(=O)[N-]Cl

Data Sources

EPA TSCA InventoryRetrieved 2026-04-29
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Chloramine-T (CAS 127-65-1) https://chemicalindependence.com/chemical/127-65-1/ EPA TSCA Inventory: CAS 127-65-1. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 127-65-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 127-65-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293590 for CAS 127-65-1. Reporting year: 2024. https://usatrade.census.gov/