Use this chemical compound lookup to search by name, alias, or formula, then calculate molar mass, grams-to-moles conversion, particle-count context.
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Search a chemical compound by name, formula, or alias This chemical compound lookup works as both a compound finder and a chemical formula molar mass lookup.
Search common names like table salt, enter a molecular formula like NaCl, or type a less common formula to
calculate molar mass, grams-to-moles conversion, and particle-count context in one place.
Quick examples
How this lookup works Exact matches use a curated compound database with common names and aliases. If no exact database match is
found, the page falls back to direct formula parsing so you can still perform a chemical compound lookup by
formula and retrieve the molar mass.
Chemical compound lookup result
Water
Molecular formula: H2O
Matched the entered compound name against the curated compound database.
Molar mass
18.02 g/mol
Classification
Molecular compound
Unique elements
2
Count as
molecules
Grams-to-moles worksheet
Entered mass
18.02 g
Moles
1 mol
Approximate molecules
6.022141e+23
18.015 g of H2O corresponds to about 1 mol, or Avogadro-scaled counting of molecules.
How to read this result
Useful reference point for mole concepts because 18.015 g corresponds to about 1 mol of water molecules.
Universal solvent used across classroom, lab, and industrial workflows.
Oxygen contributes 88.8093% of the total mass, the largest share in this formula.
Curated lookup match This matched the page's practical compound database. Use the formula, molar mass, and
grams-to-moles output for worksheet planning, then check a full database when you need
CAS-style identifiers, hazards, structures, or regulatory details.
Chemical compound lookup by name or formula, with molar mass and grams-to-moles conversion
Use this chemical compound lookup to search common compounds by name, alias, or molecular formula, then turn the result into a practical molar-mass workflow. The page works as a compound finder, a compound formula lookup, and a chemical formula molar mass lookup, so you can move from `table salt`, `NaCl`, or `CuSO4·5H2O` into grams-to-moles conversion and particle-count context without switching tools.
What a chemical compound lookup should actually solve
A weak lookup page only tells you a name and a formula. A useful chemical compound lookup should help you answer the next question too: what molar mass should you use, what does that formula represent, and how do you turn a real sample mass into moles or particle counts? That broader workflow is why this page combines a compound database with direct formula parsing and mass conversion.
That matters because users do not all begin from the same place. Some remember the common name, such as baking soda or table salt. Some only know the molecular formula. Others have a formula from a label or worksheet but no common-name match. A good compound finder should handle all three entry points naturally.
Search by common name, alias, or molecular formula
The curated lookup layer covers widely used compounds and their common aliases, so a search like `table salt` can resolve to sodium chloride and `baking soda` can resolve to sodium bicarbonate. That is more useful than a short dropdown because real users often remember the household or classroom name first, not the exact formula.
If there is no exact curated match, the page falls back to formula parsing. That means the same chemical compound lookup by formula can still return a valid molar mass for entries such as `K4[Fe(CN)6]`, grouped formulas like `Ca(OH)2`, or hydrate notation like `CuSO4·5H2O`. In practice, this makes the page work like both a compound database and a formula-first chemistry worksheet.
How the lookup result turns into molar mass and grams-to-moles output
Once the page identifies a compound or parses the formula, the next step is molar mass. Molar mass is the bridge between a molecular formula and a measurable mass in the lab or classroom. Divide the entered grams by the molar mass to get moles, then multiply the mole amount by Avogadro's number to estimate the number of molecules, formula units, or other particles.
The page keeps the particle language visible because not every substance is best described as molecules. Ionic compounds such as sodium chloride are more accurately discussed in formula units, while covalent compounds such as water are usually discussed in molecules. The numeric conversion is the same, but the chemistry wording should still be correct.
moles = mass (g) / molar mass (g/mol)
Core grams-to-moles relationship used after the compound or formula has been identified.
particles = moles × 6.022 × 10^23
Converts the mole amount into an approximate particle count using Avogadro's number.
Worked example: table salt versus hydrate notation
Suppose you search `table salt`. The lookup resolves that alias to sodium chloride, NaCl, and shows a molar mass of about 58.44 g/mol. If you enter 58.44 g, the page returns about 1 mol and approximately 6.022 × 10^23 formula units. That is a practical example of why alias-aware search is valuable: the user can begin with ordinary language and still reach the chemistry calculation quickly.
Now compare that with `CuSO4·5H2O`. Many simplified lookup tools fail here because hydrate notation is not just decoration; the water molecules contribute real mass. This page parses the hydrate directly, so the returned molar mass reflects the full copper sulfate pentahydrate formula rather than the anhydrous salt. That is the kind of detail that matters in lab prep, stoichiometry checks, and chemistry homework.
When a compound formula lookup is enough and when you need a deeper database
For many teaching and workflow questions, a compound formula lookup plus molar mass is enough. If you need to confirm that `glucose` is `C6H12O6`, compare the mass of `H2O2` versus `H2O`, or turn an entered mass into moles, the page already covers the important chemistry relationship. It is especially useful when your actual question is about mass, amount of substance, or particle count rather than detailed physical-property data.
Use a fuller chemistry database when you need hazards, spectral data, structure diagrams, detailed thermodynamic properties, regulatory records, or literature identifiers. PubChem and the NIST Chemistry WebBook are stronger choices for that broader reference work. Use a dedicated molecular-weight calculator when your main task is parsing unfamiliar formulas rather than looking up common compounds by name.
Further reading
Molecular weight calculator — Best follow-on tool when the main task is formula parsing and full composition breakdown rather than common-name lookup.
Grams to moles converter — Useful when the formula is already known and you only need to convert a mass into moles.
Element weights lookup — Better fit when you need elemental atomic weights rather than compound molar masses.
Identifier, structure, and safety lookup are different jobs
A formula-first lookup can tell you the mass implied by a chemical formula, but it cannot uniquely identify every real-world substance. The same molecular formula may correspond to multiple structural isomers, salts, solvates, or records with different identifiers. That is why PubChem-style compound search tools also support names, synonyms, molecular formula search, structure search, CAS-style registry references, InChI, SMILES, and database identifiers.
Use this page when the question is, "What molar mass should I use, and what does this gram amount mean in moles?" Use PubChem, NIST, a safety data sheet, or your lab's required reference when the question is, "Which exact compound record, structure, hazard statement, or property table applies?" Keeping those jobs separate avoids the common mistake of treating a formula-parser result as a verified identity record.
What this page does not replace
This page is designed for chemistry lookup, molar-mass reference, and introductory conversion work. It does not replace a full compound database, structural-chemistry software, isotope-specific mass tables, or lab documentation requirements. The fallback parser can calculate the mass implied by a formula, but it does not prove that the entered species is chemically realistic under a particular condition.
Use the result as a fast, reader-first chemistry workflow: identify the compound, confirm the molecular formula, read the molar mass, then move into grams-to-moles or particle-count reasoning. For high-stakes lab, regulatory, or analytical work, confirm the relevant values and naming against the appropriate primary chemistry references.
Further reading
PubChem — Broad chemistry database covering compound names, identifiers, structures, and related reference information.
NIST Chemistry WebBook — Reference source for compound properties and deeper substance-specific lookup work.
Frequently asked questions
What is a chemical compound lookup?
A chemical compound lookup helps you identify a substance from its name, alias, or formula, then retrieve the chemistry information you need next. On this page that means the formula, molar mass, grams-to-moles conversion, and an approximate particle count.
Can I use this page as a chemical compound lookup by formula?
Yes. You can enter formulas directly, including grouped formulas such as Ca(OH)2 and hydrate notation such as CuSO4·5H2O. If the formula is not in the curated database, the page falls back to direct formula parsing.
What is the difference between a compound lookup and a molecular weight calculator?
A compound lookup starts with identification: common name, alias, or formula. A molecular weight calculator is more explicitly formula-first and usually focuses on parsing plus composition detail. This page blends the two, but the separate molecular-weight tool is better when your main task is analyzing unfamiliar formulas rather than finding a common compound.
Why does the page sometimes say molecules and sometimes formula units?
Because the chemistry wording depends on the type of substance. Covalent compounds such as water are usually counted as molecules, while ionic compounds such as sodium chloride are more accurately counted as formula units. The counting math still uses Avogadro's number either way.
Does the curated compound database include every possible compound?
No. The page includes a practical set of common compounds and aliases, not an exhaustive chemistry registry. When a common-name match is unavailable, the fallback parser can still calculate molar mass from a valid formula.
Can I search common names like table salt or baking soda?
Yes. Alias support is one of the main reasons this page is more useful than a dropdown-only lookup. Searches such as table salt, baking soda, and Epsom salt can resolve to the underlying chemistry formula and molar mass.
How are grams converted into moles here?
The page divides the entered mass in grams by the returned molar mass in g/mol. That gives the amount of substance in moles, which can then be scaled into a particle count using Avogadro's number.
Can this page replace PubChem or NIST?
No. It is a quicker chemistry worksheet and reference layer, not a full research database. Use PubChem or NIST when you need identifiers, structures, hazards, literature links, or deeper physical-property data.
Can I search by CAS number, SMILES, InChI, or structure?
No. This page is designed for common names, aliases, and chemical formulas. Use PubChem, NIST, or another chemistry database when you need identifier lookup, structure search, SMILES, InChI, CAS-style references, hazards, or regulatory records.
Does a formula-parser result prove the compound is real?
No. A parser can calculate the molar mass implied by a formula, but it cannot prove that the species is stable, named, purchasable, safe, or relevant under your lab conditions. Treat parser-only results as formula math and confirm real compound identity in a proper database when it matters.
Why is hydrate notation important in a compound formula lookup?
Hydrate notation changes the mass you must use. In CuSO4·5H2O, the water of crystallization contributes real atoms and therefore real mass. Ignoring the hydrate part would understate the molar mass and distort any grams-to-moles conversion.
