Molekula
Methyl Purple indicator solution 0.1% in water
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
Methyl Purple indicator solution 0.1% in water is a pH indicator used in titrations and analytical chemistry to detect acid-base transitions. It appears as a purple solution and, as a mixed indicator, changes color from purple in acid to green in alkaline solution at approximately pH 4.8 to 5.4. CAS: 1340-02-9, Molecular Formula: C67H62N8Na4O14S3, Molecular Weight: 1391.41 g/mol. Stored at ambient temperature. Molekula supplies Methyl Purple indicator solution 0.1% in water 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 | Dark green liquid |
| Assay | 0.1 % w/v + 0.005 % w/v |
| Colour Change | pH 4.8 (purple) to pH 5.4 (green) |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90037851 |
| CAS Number | 1340-02-9 |
| IUPAC Name | tetrasodium;bis(2-[[4-(dimethylamino)phenyl]diazenyl]benzoate);2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]-5-hydroxybenzenesulfonate |
| Molecular Formula | C67H62N8Na4O14S3 |
| Molecular Weight | 1391.41 |
| Exact Mass | 1390.3138 |
| SMILES | CCN(CC1=CC(=CC=C1)S(=O)(=O)[O-])C2=CC=C(C=C2)C(=C3C=CC(=[N+](CC)CC4=CC(=CC=C4)S(=O)(=O)[O-])C=C3)C5=C(C=C(C=C5)O)S(=O)(=O)[O-].CN(C)C1=CC=C(C=C1)N=NC2=CC=CC=C2C(=O)[O-].CN(C)C1=CC=C(C=C1)N=NC2=CC=CC=C2C(=O)[O-].[Na+].[Na+].[Na+].[Na+] |
| InChIKey | CNJVTYXLOYTWPD-UHFFFAOYSA-J |
| InChI | InChI=1S/C37H36N2O10S3.2C15H15N3O2.4Na/c1-3-38(24-26-7-5-9-33(21-26)50(41,42)43)30-15-11-28(12-16-30)37(35-20-19-32(40)23-36(35)52(47,48)49)29-13-17-31(18-14-29)39(4-2)25-27-8-6-10-34(22-27)51(44,45)46;2*1-18(2)12-9-7-11(8-10-12)16-17-14-6-4-3-5-13(14)15(19)20;;;;/h5-23H,3-4,24-25H2,1-2H3,(H3,41,42,43,44,45,46,47,48,49);2*3-10H,1-2H3,(H,19,20);;;;/q;;;4*+1/p-4 |
| PubChem CID | 22836353 |
| REACH Code | Y113 |
| HTS Code | 2927.00.5000 |
| Tariff Code | 2927000090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
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
- 8-Hydroxy-11-methyldibenz(b,e)(1,4)oxazepin-2(11H)one
- Methyl purple
- Methyl Purple (in H2O)
Frequently asked questions
What is Methyl Purple indicator solution used for?
It is used as a pH indicator in titrations, particularly around pH 4.8 to 5.4, where it changes color from purple (acid) to green (alkaline).
What is the chemical formula and molecular weight of Methyl Purple?
The formula is C67H62N8Na4O14S3 with a molecular weight of 1391.41 g/mol.
How should Methyl Purple indicator solution be stored?
Store at ambient temperature, protected from light and moisture.
What grade of Methyl Purple is available?
Available as a 0.1% aqueous solution, suitable for laboratory use.
Can Molekula supply Methyl Purple in bulk quantities?
Yes, Molekula can supply Methyl Purple in bulk; please contact our sales team for volume pricing and availability.
What documentation comes with a purchase of Methyl Purple?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS), available upon request.
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.