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Sulfur vs. Sulphur — What's the Difference?

By Urooj Arif & Maham Liaqat — Updated on April 24, 2024
Sulfur is the American English spelling of the chemical element, while sulphur is preferred in British English, both representing element 16 on the periodic table.
Sulfur vs. Sulphur — What's the Difference?

Difference Between Sulfur and Sulphur

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Key Differences

Sulfur is the spelling commonly used in American English, especially in scientific contexts and official nomenclature. Whereas, sulphur is the variant preferred in British English, and is commonly seen in general usage as well as in academic and scientific publications in the UK and Commonwealth countries.
In the realm of international scientific organizations like IUPAC, sulfur is the standardized spelling recommended for use in scientific papers and publications. On the other hand, sulphur may still appear in works that adhere to British English standards, although the international science community largely follows the IUPAC guidelines.
When it comes to textbooks and educational materials, American schools and publications use 'sulfur.' Conversely, British educational resources typically spell it as 'sulphur,' reflecting the general spelling preferences of the region.
In digital media and software that involves chemical data, 'sulfur' is predominantly used to maintain consistency with international scientific databases. Meanwhile, British software or media might opt for 'sulphur' to align with local spelling conventions.
For labeling on products and in chemical safety data sheets, the spelling 'sulfur' is often seen globally, promoting uniformity in chemical communication. However, products manufactured in or for the British market may label it as 'sulphur,' adhering to local spelling norms.
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Comparison Chart

Spelling in American English

Sulfur
Not commonly used

Spelling in British English

Less common, but still recognized
Sulphur

Usage in IUPAC

Official spelling
Considered an acceptable variant

Educational Textbooks

Sulfur
Sulphur

Chemical Labeling

Sulfur
May be labeled as sulphur

Compare with Definitions

Sulfur

A yellow, nonmetallic element, essential for life.
Sulfur is crucial in biological systems for synthesizing certain amino acids.

Sulphur

Used in the production of sulfuric acid.
Sulphur reacts with oxygen and water to form sulfuric acid.

Sulfur

Used in the vulcanization of rubber.
Sulfur is heated with natural rubber to improve its durability.

Sulphur

Found in meteorites and minerals.
Sulphur is sometimes discovered in its native form in meteorites.

Sulfur

Used historically in traditional medicine.
Sulfur was once commonly used to treat skin conditions.

Sulphur

A component in gunpowder.
Sulphur is mixed with charcoal and potassium nitrate to make gunpowder.

Sulfur

An ingredient in many fertilizers.
Sulfur is added to soil to enhance plant growth.

Sulphur

Utilized in matches and fireworks.
Sulphur helps to ignite matches quickly and safely.

Sulfur

Found in natural hot springs and volcanic regions.
The smell of sulfur is strong around geothermal areas.

Sulphur

A chemical element with atomic number 16.
Sulphur is one of the basic elements in the periodic table.

Sulfur

Sulfur (in British English: sulphur) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic.

Sulphur

The chemical element of atomic number 16, a yellow combustible non-metal
The islands are also renowned for their thermal springs and sulphur baths
We should use coal which contains less sulphur

Sulfur

Symbol S A pale yellow nonmetallic element occurring widely in nature in several free, allotropic and crystal forms and combined in numerous sulfates and sulfides. It is used in black gunpowder, rubber vulcanization, the manufacture of insecticides and pharmaceuticals, and in the preparation of sulfur compounds such as hydrogen sulfide and sulfuric acid. Atomic number 16; atomic weight 32.066; melting point 115.21°C; boiling point 444.61°C; specific gravity at 20°C (rhombic) 2.07, (monoclinic) 2.00; valence 2, 4, 6. See Periodic Table.

Sulphur

An American butterfly with predominantly yellow wings that may bear darker patches.

Sulfur

Any of various butterflies of the subfamily Coliadinae of the family Pieridae, having yellow or orange wings often marked with black.

Sulphur

Disinfect or fumigate with sulphur.

Sulfur

To treat with sulfur or a compound of sulfur.

Sulphur

Variant of sulfur.

Sulfur

(uncountable) A chemical element (symbol S) with an atomic number of 16.

Sulphur

Alternative spelling of sulfur

Sulfur

A yellowish green colour, like that of sulfur.

Sulphur

Alternative spelling of sulfur

Sulfur

Any of various pierid butterflies of the subfamily Coliadinae, especially the sulfur-coloured species.

Sulphur

A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast beds mixed with gypsum and various earthy materials, from which it is melted out. Symbol S. Atomic weight 32. The specific gravity of ordinary octohedral sulphur is 2.05; of prismatic sulphur, 1.96.

Sulfur

Of a yellowish green colour, like that of sulfur.

Sulphur

Any one of numerous species of yellow or orange butterflies of the subfamily Pierinæ; as, the clouded sulphur (Eurymus philodice syn. Colias philodice), which is the common yellow butterfly of the Eastern United States.

Sulfur

(transitive) To treat with sulfur, or a sulfur compound, especially to preserve or to counter agricultural pests.

Sulphur

An abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)

Sulfur

An abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)

Sulphur

Treat with sulphur in order to preserve;
These dried fruits are sulphured

Sulfur

Treat with sulphur in order to preserve;
These dried fruits are sulphured

Common Curiosities

Why does IUPAC prefer 'sulfur'?

IUPAC prefers 'sulfur' to standardize scientific communication internationally.

Are sulfur and sulphur chemically different?

No, they refer to the same chemical element with the symbol S and atomic number 16.

Can sulfur and sulphur be used interchangeably in scientific writing?

In international contexts, 'sulfur' is recommended, though 'sulphur' can be used in British English contexts.

Is sulphur still taught in UK schools?

Yes, 'sulphur' is commonly taught and used in UK schools.

What spelling do Canadian writers prefer?

Canadian writers might use either, though 'sulfur' aligns with North American conventions.

How do English language dictionaries define sulfur/sulphur?

They define both spellings as referring to the same chemical element, often noting regional usage differences.

What is the primary difference between sulfur and sulphur?

The primary difference is in spelling; 'sulfur' is used in American English, while 'sulphur' is preferred in British English.

Do American scientists ever use 'sulphur'?

American scientists typically use 'sulfur' following the IUPAC and American English conventions.

How does the spelling affect chemical formula notation?

It does not affect chemical formulas, as the element symbol 'S' remains constant.

Are there any historical reasons for the different spellings?

The spelling variations have evolved over time with American English often simplifying or altering British spellings.

Has the spelling changed over time in scientific contexts?

Yes, 'sulfur' has become more standardized in scientific contexts over recent decades.

Do international chemical companies prefer one spelling over the other?

International companies tend to use 'sulfur' for consistency in global markets.

Is there a trend towards one spelling in scientific journals?

Yes, there is a trend towards using 'sulfur' in scientific journals globally.

Is one spelling more correct than the other?

Neither spelling is more correct; it depends on regional language conventions.

Will British English eventually adopt 'sulfur'?

It's possible but uncertain, as British English often retains traditional spellings.

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Author Spotlight

Written by
Urooj Arif
Urooj is a skilled content writer at Ask Difference, known for her exceptional ability to simplify complex topics into engaging and informative content. With a passion for research and a flair for clear, concise writing, she consistently delivers articles that resonate with our diverse audience.
Co-written by
Maham Liaqat

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