Phosphotungstic acid, made in Vadodara since 1998.
We make heteropolyacids at our own works in Jarod, Gujarat, in lots from 100 g to 500 kg.
Paresh Prajapati, the proprietor, answers enquiries himself, usually within a day.
DIMPLE ASSOCIATES
Works: Prince Industrial Estate, Jarod, Vadodara 391520
- Product
- Phosphotungstic acid hydrate
- CAS no.
- 12501-23-4
- Grade
- AR or LR
- Batch size
- 150 kg standard
| Parameter | Specification |
|---|---|
| Description | White fine crystals |
| Insoluble matter | max 0.01 % |
| Chloride (Cl) | max 0.02 % |
| Heavy metals (as Pb) | max 0.005 % |
| Iron (Fe) | max 0.003 % |
| Copper (Cu) | max 0.001 % |
- 1998
- Same works, same proprietor
- 500 kg
- Phosphotungstic acid a month, at most
- 150 kg
- Standard batch
- 100 g
- Smallest qualification lot
- 24 yrs
- Our longest-standing customer
Four heteropolyacids, all made at our works.
Open a product for its grade, packing and storage. We do not buy in and relabel anything on this page.
Phosphotungstic acid
H₃PW₁₂O₄₀ · xH₂O12501-23-4Export and domestic
Grade and form
AR and LR grades. White fine crystals, assayed on every batch.
Packing
100 g, 500 g, 1 kg and 25 kg HDPE, double-sealed with desiccant.
Qualification lots from 100 g, quoted individually.
Buyers use it for
- Pharmaceutical intermediates and alkaloid precipitation
- Negative staining in electron microscopy
- Histology stains, including Masson trichrome
- Heteropolyacid catalysis
Phosphomolybdic acid
H₃PMo₁₂O₄₀ · xH₂O51429-74-4Export and domestic
Grade and form
95 % minimum. Yellow to yellow-green powder, assayed on every batch.
Packing
5 kg packs as standard. 100 g to 25 kg on request, in amber or opaque packing because it is light-sensitive.
Buyers use it for
- TLC and spray reagent in organic analysis
- Pharmaceutical and pigment intermediates
- Oxidation catalysis
Silicotungstic acid
H₄SiW₁₂O₄₀ · xH₂O12027-43-9Made to order
Grade and form
Reagent grade with low alkali and chloride. Colourless to white crystalline hydrate.
Packing
100 g, 500 g, 1 kg and 25 kg HDPE. Keep it sealed and reassay after long storage.
Buyers use it for
- Acid catalysis and esterification
- Electrochemistry and membrane research
- Analytical precipitation
Sodium tungstate dihydrate
Na₂WO₄ · 2H₂O10213-10-2Made to order
Grade and form
Reagent grade, low molybdenum. White crystalline powder.
Packing
500 g, 1 kg, 25 kg, and 50 kg fibre drums with a PE liner. Minimum order 500 g.
Buyers use it for
- Feedstock for tungsten chemistry
- Flame-retardant formulations
- Catalyst precursors
Oxidiser salts, for buyers in India
We hold no export licence for these, so we sell them within India only. Packs of 1 kg, 5 kg and 25 kg HDPE.
- Ammonium perchlorate7790-98-9
- Potassium perchlorate7778-74-7
- Lithium perchlorate7791-03-9
- Sodium perchlorate7601-89-0
- Magnesium perchlorate10034-81-8
Also made to order
Lead times run longer than for the four above. Ask with your grade and quantity before you plan around them.
- Tungstic acid7783-03-1
- Ammonium ceric nitrate16774-21-3
- Ammonium ceric sulphate10378-47-9
- Ceric sulphate13590-82-4
- Sodium nitroprusside13755-38-9
- Diboron trioxide1303-86-2
- Adenine73-24-5
Phosphotungstic acid: the full specification.
These are the limits we commit to on our technical specification. Your certificate shows the measured result for your batch beside each one.
| Parameter | Limit |
|---|---|
| Identity | |
| Chemical name | Dodecatungstophosphoric acid |
| Molecular weight | ≈ 2880.05 g/mol |
| Appearance | White fine crystals |
| Impurities | |
| Insoluble matter | max 0.01 % |
| Chloride (Cl) | max 0.02 % |
| Nitrate (NO₃) | max 0.05 % |
| Sulphate (SO₄) | max 0.01 % |
| Heavy metals (as Pb) | max 0.005 % |
| Iron (Fe) | max 0.003 % |
| Copper (Cu) | max 0.001 % |
| Reported on every certificate | |
| Assay | Measured per batch |
| Loss on drying, water content | Measured per batch |
Packing and storage
Double-sealed HDPE with desiccant. The acid is strongly hygroscopic, so keep it closed in a dry place and assay on receipt if it has been stored a long time.
Quality, and how you can check it
- We assay every batch in our own laboratory.
- The certificate carries the lot number and production date.
- On request, we send samples to an independent laboratory and ship its report with the order.
Want the documents?
Ask for the technical specification or a recent certificate when you enquire. We send both as PDFs.
How an order runs.
You enquire
Send the compound, grade, quantity and destination.
We quote
Paresh prices against that day's tungsten or molybdenum cost and tells you how long the quote holds.
You qualify
Most new buyers start with a paid lot of 100 g or more for their QC.
We make the batch
We run it at Jarod, assay it, and pack it in sealed HDPE marked with the lot number.
It ships
Export orders go to your merchant exporter with the certificate. Domestic orders go by road.
Why we quote each order instead of publishing prices
Tungsten makes up about three quarters of phosphotungstic acid by mass, and its price moves with the commodity market. A fixed list price would be out of date within weeks. Ask, and Paresh will show you how he built the number.
Customers who keep reordering.
Pharmaceutical buyers requalify their suppliers on a schedule. These four have kept us on their approved list for years.
Through the merchant exporters who hold the licences, our material has shipped to the United States, Japan, South Korea, Canada, China, South Africa and Brazil.
One proprietor, since 1998.
Paresh Prajapati started Dimple Associates in 1998 and still runs it from the same works in Jarod. He buys the feedstock, runs the batches, checks the assay and signs the certificate.
You deal with him directly. Ask a technical question and the person who made your batch answers it. If you need a large sales team and an account manager, a bigger supplier will suit you better, and he will tell you so.
Our office is in Gotri, Vadodara. You can check the business on IndiaMART.
What we hold, and what we don't.
Buyers ask about credentials before they ask about price. Here is the answer up front.
Held
- GST registrationOur GST number is printed on every invoice.
- An in-house assay on every batchTied to the lot number and production date.
- Third-party test reportsArranged on request from an independent laboratory.
- One works since 1998Prince Industrial Estate, Jarod. Same phone number throughout.
Not held
- ISO 9001We are not certified. We plan to apply.
- An export licenceExport orders move through the merchant exporter on the order.
- Export clearance for perchloratesWe sell oxidiser salts inside India only.
Questions buyers ask.
Do you manufacture, or buy and relabel?
We manufacture. We make every compound on this page at our works in Jarod from bought-in tungsten and molybdenum feedstock. That is also why the list is short.
Can I get a free sample?
We charge for samples and quote each one. A 100 g qualification lot gives your QC enough material to decide.
Can you deliver to my door abroad?
We sell through merchant exporters, who handle the licence, documents and freight. If you have no exporter, tell Paresh where the material needs to go and he will say whether one of his exporters can take it.
How much can you make?
Up to about 500 kg of phosphotungstic acid a month, in standard 150 kg batches, with other compounds running alongside. Our largest single order so far was 500 kg. For more than that, the limit is feedstock, and Paresh will work out a schedule with you.
How fast do you reply?
Within a day, every day of the week, usually on WhatsApp.
Send an enquiry.
Choose what you need and we will write the message for you. It opens in WhatsApp or your email, and nothing goes anywhere until you press send.
- WhatsApp or phone
- +91 99250 03910
- Works
- 23/30 Prince Industrial Estate, Mota Motipura, Jarod, Ta. Savli, Vadodara 391520, Gujarat
- Office
- B-5/301 Labh Exotica, Nr Radiyatba Nagar, Opp Yash Complex, Gotri, Vadodara 390023, Gujarat