Molekula
Sulfuric acid, fuming, 20-30% SO3
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Fuming sulfuric acid (20-30% SO3) is a highly corrosive, concentrated form of sulfuric acid enriched with sulfur trioxide, used in industrial processes like nitration, sulfonation, and petroleum refining. It serves as a strong dehydrating agent and catalyst in chemical synthesis. CAS 8014-95-7, molecular formula H₂SO₄·SO₃, molecular weight 98.08 g/mol. Store at ambient conditions in a tightly sealed container. Signal word: Danger. Molekula supplies fuming sulfuric acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 L — $296.10 per pack
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Clear, colourless liquid |
| Chloride (Cl-) | ≤0.0005% |
| Residue on Ignition | ≤0.01% |
| Heavy Metals (Pb) | ≤0.0005% |
| Iron (Fe) | ≤0.005% |
| Arsenic (As) | ≤0.000003% |
| Ammonium (NH4+) | ≤0.0002% |
| SO3 | ≤87.0% |
| Free SO3 | 20-30% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8(6.1) |
| Packing Group | I |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90026818 |
| CAS Number | 8014-95-7 |
| IUPAC Name | sulfuric acid;sulfur trioxide |
| Molecular Formula | H2SO4.SO3 |
| Molecular Weight | 98.08 |
| Exact Mass | 177.9242 |
| SMILES | OS(=O)(=O)O.O=S(=O)=O |
| InChIKey | HIFJUMGIHIZEPX-UHFFFAOYSA-N |
| InChI | InChI=1S/H2O4S.O3S/c1-5(2,3)4;1-4(2)3/h(H2,1,2,3,4); |
| PubChem CID | 24681 |
| UN Number | UN1831 |
| REACH Code | Y110 |
| HTS Code | 2807.00.0000 |
| Tariff Code | 2807000000 |
Safety & GHS
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Corrosive
GHS05
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Toxic
GHS06
Hazard statements
- EUH014 Reacts violently with water
- H314 (sub cat. 1A) Causes severe skin burns and eye damage
- H330 Fatal if inhaled
- H335 May cause respiratory irritation
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P284 Wear respiratory protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is fuming sulfuric acid (20-30% SO₃) commonly used for?
Fuming sulfuric acid is primarily used in nitration reactions, sulfonation processes, and as a dehydrating agent in organic synthesis, including the production of explosives, dyes, and detergents.
What is the molecular formula and molecular weight of this product?
The molecular formula is H₂SO₄·SO₃ (oleum), and the molecular weight is 98.08 g/mol (for the H₂SO₄ component).
How should fuming sulfuric acid (20-30% SO₃) be stored?
Store in a tightly sealed, corrosion-resistant container at ambient temperature, away from moisture, organic materials, and incompatible substances.
What grades or purities of fuming sulfuric acid does Molekula supply?
Molekula supplies technical-grade fuming sulfuric acid (20-30% SO₃) for industrial and laboratory applications.
Can Molekula supply this product in bulk quantities?
Yes, Molekula can provide bulk quantities of fuming sulfuric acid (20-30% SO₃) upon request, subject to availability and customer requirements.
What documentation comes with an order of fuming sulfuric acid?
Each order includes a Material Safety Data Sheet (MSDS), Certificate of Analysis (CoA), and batch-specific documentation for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.