Is 'bisulphate' the same as 'disulphate'?

No, they are different. 'Bisulphate' (HSO₄⁻) is an acid sulphate with one hydrogen. 'Disulphate' (e.g., S₂O₇²⁻) contains two sulphate groups linked by an oxygen atom.

Can I use 'bisulfate' in British English?

Yes, especially in modern scientific writing. 'Bisulphate' is the traditional UK spelling, but the IUPAC-influenced 'bisulfate' (with 'f') is widely accepted and increasingly common to align with international journals.

Is bisulphate dangerous?

It depends on the specific salt (e.g., sodium, potassium). Most bisulphates are acidic and can be corrosive, causing irritation to skin, eyes, and respiratory tract. Always consult the relevant Safety Data Sheet (SDS).

Where would I encounter bisulphate in daily life?

The most common encounter is with sodium bisulphate, sold as a dry acid for lowering the pH and alkalinity in swimming pools and spas, or as a cleaner/descaling agent.

Is “bisulphate” formal?

Bisulphate is usually technical/scientific in register.

How do you pronounce “bisulphate”?

Bisulphate: in British English it is pronounced /baɪˈsʌlfeɪt/, and in American English it is pronounced /baɪˈsʌlfeɪt/. Tap the audio buttons above to hear it.

bisulphate: meaning, definition, pronunciation and examples

UK/baɪˈsʌlfeɪt/US/baɪˈsʌlfeɪt/

Technical/Scientific

My Flashcards

Quick answer

What does “bisulphate” mean?

A chemical salt containing the HSO₄⁻ ion, or an acid sulphate where only one hydrogen of sulphuric acid has been replaced by a metal.

Audio

Pronunciation

Definition

Meaning and Definition

A chemical salt containing the HSO₄⁻ ion, or an acid sulphate where only one hydrogen of sulphuric acid has been replaced by a metal.

The term refers specifically to the anion HSO₄⁻ or to salts containing it, which are intermediate products in the formation of normal sulphates. It's commonly used in industrial chemistry, electrochemistry (e.g., in lead-acid batteries), and laboratory processes.

Dialectal Variation

British vs American Usage

Differences

Spelling: 'bisulphate' (UK) vs. 'bisulfate' (US). The 'ph' vs. 'f' distinction follows the general British/American pattern for sulphur/sulfur compounds.

Connotations

Identical technical meaning. The UK spelling is becoming less common even in British technical literature, with 'hydrogen sulphate' or the American spelling 'bisulfate' often used.

Frequency

Low frequency in both dialects, confined to chemistry texts, industrial specifications, and academic papers. The US spelling ('bisulfate') is increasingly dominant globally in scientific publishing.

Grammar

How to Use “bisulphate” in a Sentence

[Metal] bisulphateBisulphate of [metal][Process] with bisulphate

Vocabulary

Collocations

strong

sodium bisulphatepotassium bisulphateammonium bisulphateaqueous bisulphate

medium

bisulphate ionbisulphate saltbisulphate solutionlead bisulphate

weak

concentrated bisulphateadd bisulphateform bisulphatebisulphate concentration

Examples

Examples of “bisulphate” in a Sentence

adjective

British English

The bisulphate solution was carefully titrated.
We analysed the bisulphate content of the sample.

American English

The bisulfate solution was carefully titrated.
We analyzed the bisulfate content of the sample.

Usage

Meaning in Context

Business

Used in procurement, safety data sheets (SDS), and industrial process descriptions for cleaning, metal treatment, or water pH adjustment.

Academic

Core term in chemistry, chemical engineering, and materials science papers discussing acid-base reactions, electrochemistry, or salt preparation.

Everyday

Virtually never used. Might be encountered on cleaning product labels (e.g., 'sodium bisulphate' as a pH reducer for pools).

Technical

Precise term in laboratory procedures, battery chemistry (lead-acid battery plates contain lead bisulphate), and industrial chemical formulations.

Vocabulary

Synonyms of “bisulphate”

Strong

HSO₄⁻ (ion)

Neutral

hydrogen sulphateacid sulphate

Vocabulary

Antonyms of “bisulphate”

normal sulphatesulphate

Watch out

Common Mistakes When Using “bisulphate”

Misspelling as 'bisulphide' (a different compound containing sulphur and another element).
Using 'bisulphate' as a verb or adjective.
Pronouncing it /baɪˈsʌlfɪt/ (like 'sulphite') instead of /baɪˈsʌlfeɪt/.

FAQ

Frequently Asked Questions

: No, they are different. 'Bisulphate' (HSO₄⁻) is an acid sulphate with one hydrogen. 'Disulphate' (e.g., S₂O₇²⁻) contains two sulphate groups linked by an oxygen atom.
: Yes, especially in modern scientific writing. 'Bisulphate' is the traditional UK spelling, but the IUPAC-influenced 'bisulfate' (with 'f') is widely accepted and increasingly common to align with international journals.
: It depends on the specific salt (e.g., sodium, potassium). Most bisulphates are acidic and can be corrosive, causing irritation to skin, eyes, and respiratory tract. Always consult the relevant Safety Data Sheet (SDS).
: The most common encounter is with sodium bisulphate, sold as a dry acid for lowering the pH and alkalinity in swimming pools and spas, or as a cleaner/descaling agent.
: A chemical salt containing the HSO₄⁻ ion, or an acid sulphate where only one hydrogen of sulphuric acid has been replaced by a metal.
: Bisulphate is usually technical/scientific in register.
: Bisulphate: in British English it is pronounced /baɪˈsʌlfeɪt/, and in American English it is pronounced /baɪˈsʌlfeɪt/. Tap the audio buttons above to hear it.

Learning

Memory Aids

Mnemonic

Think: 'BI' (means two, here hinting at two parts: Hydrogen + Sulphate) + 'SULPHATE'. It's a sulphate with a 'spare' hydrogen atom attached.

Conceptual Metaphor

A 'half-neutralised' acid. Imagine sulphuric acid (H₂SO₄) where only one of its two acidic hydrogen atoms has been swapped for a metal.

Practice

Quiz

Fill in the gap

In the lead-acid battery, the positive plate undergoes a transformation to lead dioxide, while the negative plate forms spongy lead, with being present in the electrolyte during discharge.

Multiple Choice

What is the primary difference between 'sulphate' and 'bisulphate'?