Molekula
Litmus
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Litmus is a natural pH indicator derived from lichens, commonly used in laboratories to test the acidity or alkalinity of solutions. It turns red in acidic conditions and blue in basic conditions. Available in solution or paper form, it is stable at ambient temperatures.
Molekula supplies Litmus in 25 g packs, from £55.32 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 5 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
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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25 g — £46.10 per pack ex VAT · £55.32 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 | Deep blue crystalline powder |
| Identification | Conforms to reference |
| Loss on Drying | ≤35.0% |
| Transition Range (pH 5-8) | Red to Blue |
| Absorption maxima | 580 - 585nm (pH8.0) |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 37751194 |
| CAS Number | 1393-92-6 |
| Molecular Formula | N/A |
| Molecular Weight | N/A |
| SMILES | CCN(C)CC(C)O |
| REACH Code | Y113 |
| HTS Code | 3203001000 |
| Tariff Code | 3203001000 |
Safety & GHS
Detailed safety information available in the SDS — see Documents below.
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is litmus commonly used for?
Litmus is primarily used as a pH indicator to test whether a substance is acidic or basic (alkaline), typically in solution form for qualitative analysis.
What is the chemical formula and molecular weight of litmus?
The exact chemical formula and molecular weight of litmus are not well-defined, as it is a mixture of dyes extracted from lichens (Roccella tinctoria or Lecanora tartarea).
How should litmus be stored?
Litmus should be stored at ambient temperature in a cool, dry place, away from direct sunlight and moisture to maintain its stability.
What grades or purity levels of litmus does Molekula supply?
Molekula's litmus is supplied to a specification covering appearance (deep blue crystalline powder), identification against a reference, loss on drying of no more than 35.0%, a red-to-blue transition range over pH 5-8, and absorption maxima of 580-585 nm at pH 8.0. Please contact us for details of available grades.
Can Molekula supply litmus in bulk quantities?
Yes, Molekula can provide litmus in bulk, depending on availability and customer requirements—please contact us for specific inquiries.
What documentation comes with a litmus order?
Each order includes a Certificate of Analysis (CoA) confirming the product’s suitability for pH testing, along with a Material Safety Data Sheet (MSDS) for handling and safety.
Where can I buy Litmus?
Directly from Molekula, which lists Litmus in 25 g packs from £55.32 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
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.