Molekula
Metol (4-Methylaminophenol sulfate)
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
Metol (4-Methylaminophenol sulfate) is a chemical used primarily in photographic developing solutions as a reducing agent. It is also employed in the synthesis of certain dyes and pharmaceuticals. Available in powder form, it has a molecular weight of 344.38 g/mol, a CAS number of 55-55-0, and a molecular formula of (C7H9NO)2·H2SO4. Store at ambient temperatures. Molekula supplies Metol 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.
-
500 g — £105.30 per pack ex VAT · £126.36 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 to off-white crystalline powder |
| Heavy metals | ≤0.001% |
| pH | 3.4 - 3.7 |
| Loss on Drying | ≤0.3% |
| Assay | ≥99.0% |
| Residue on Ignition | ≤0.1% |
| Iron (Fe) | ≤0.003% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 22111555 |
| CAS Number | 55-55-0 |
| Molecular Formula | (C7H9NO)2.H2SO4 |
| Molecular Weight | 344.38 |
| SMILES | CNC1=CC=C(C=C1)O.CNC1=CC=C(C=C1)O.OS(=O)(=O)O |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29222981 |
| Tariff Code | 2922290090 |
Safety & GHS
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H302 Harmful if swallowed
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H373 May cause damage to organs through prolonged or repeated exposure
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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 Metol (4-Methylaminophenol sulfate) used for?
Metol is primarily used as a photographic developing agent, especially in black-and-white film and print development, due to its high developing power and low fogging tendency.
What is the chemical formula and molecular weight of Metol?
The formula is (C7H9NO)2·H2SO4 and the molecular weight is 344.38 g/mol.
How should Metol be stored?
Metol should be stored at ambient temperature, protected from moisture and light, and kept in a tightly closed container.
What grade of Metol is available from Molekula?
Molekula supplies Metol in analytical grade, suitable for laboratory and photographic applications.
Can Molekula supply Metol in bulk quantities?
Yes, Molekula can supply Metol in bulk quantities; please contact our sales team for volume pricing and availability.
What documentation comes with a Metol order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS), compliant with GHS standards.
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.