Molekula
Formamidinesulfinic acid (Thiourea dioxide)
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
Formamidinesulfinic acid, also known as thiourea dioxide, is a sulfur-containing organic compound primarily used as a reducing agent in chemical synthesis and as a reagent in the preparation of pharmaceuticals, agrochemicals, and fine chemicals. Industrial buyers also purchase it as a bleaching agent and as a tanning agent. It is also employed in the production of dyes and as a stabilizer in polymer formulations. This chemical has a CAS number of 1758-73-2, with the molecular formula NH2C(=NH)SO2H and a molecular weight of 108.12. It requires storage between 2 to 8°C and carries a **Danger** signal word due to its hazardous properties. Molekula supplies formamidinesulfinic 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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500 g — £87.10 per pack ex VAT · £104.52 inc. VAT
Need a different quantity or pack?
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 | White crystalline powder |
| Water | ≤0.5% |
| Purity (Titration by NaOH) | ≥99.0% |
| Iron (Fe) | ≤0.003% |
| Sulphates (SO4)(2-) | ≤0.5% |
| Thiourea | ≤1.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | 2 to 8 °C |
| Transport Class | 4.2 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 46113998 |
| CAS Number | 1758-73-2 |
| IUPAC Name | amino(imino)methanesulfinic acid |
| EC Number | 217-157-8 |
| Molecular Formula | NH2C(=NH)SO2H |
| Molecular Weight | 108.12 |
| Exact Mass | 107.9993 |
| SMILES | C(=N)(N)S(=O)O |
| InChIKey | FYOWZTWVYZOZSI-UHFFFAOYSA-N |
| InChI | InChI=1S/CH4N2O2S/c2-1(3)6(4)5/h(H3,2,3)(H,4,5) |
| PubChem CID | 61274 |
| UN Number | UN3341 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29309092 |
| Tariff Code | 2930909899 |
Safety & GHS
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Flammable
GHS02
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Corrosive
GHS05
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Toxic
GHS06
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H252 Self-heating in large quantities; may catch fire
- H302 Harmful if swallowed
- H318 Causes serious eye damage
- H330 Fatal if inhaled
- H335 May cause respiratory irritation
- H373 May cause damage to organs through prolonged or repeated exposure
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- 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
- P311 Call a POISON CENTER or doctor/physician
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
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 formamidinesulfinic acid (thiourea dioxide) commonly used for?
It is primarily used as a reducing agent in organic synthesis, particularly for the reduction of nitro groups to amines, and in the production of pharmaceutical intermediates.
What is the molecular formula and molecular weight of formamidinesulfinic acid?
The molecular formula is **NH₂C(=NH)SO₂H**, and the molecular weight is **108.12 g/mol**.
How should formamidinesulfinic acid be stored?
Store at **2–8°C** in a cool, dry place, away from incompatible substances. Follow local hazardous chemical storage guidelines.
What grades or purities of formamidinesulfinic acid does Molekula supply?
Molekula supplies **high-purity (HPLC-grade) formamidinesulfinic acid** for research and synthesis applications.
Can Molekula supply formamidinesulfinic acid in bulk quantities?
Yes, bulk quantities are available upon request—contact our sales team for pricing and lead times.
What documentation comes with an order of formamidinesulfinic acid?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a product specification sheet.
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.