E337 — Potassium Sodium Tartrates
Acidity regulator and sequestrant
Also known as: Rochelle Salt · Potassium Sodium Tartrates
Verification required
Verify — Mushbooh
Source-dependent and requires verification. This additive may be derived from either halal (plant/synthetic) or haraam (animal) sources. Always check the product label or contact the manufacturer to verify the source.
Checking this in a shop right now?
Vegan / vegetarian label on pack → plant-based source → safe for this code
HFA / HMC / IFANCA / JAKIM logo → independently certified → safe
Neither? Follow the steps below.
School of Thought Breakdown
Hanafi
Verify source
Maliki
May permit
Shafi'i
Avoid if animal
Hanbali
Avoid if animal
Mushbooh - same concerns as E334. Verify tartaric acid origin.
What to do with this product
Follow these steps in order — most products resolve at step 1 or 2
Check for a "suitable for vegans" or "suitable for vegetarians" claim
If present, E337 comes from a plant-based source — safe for this code. Still check all other ingredients too.
Look for a halal certification logo on the pack
An HFA, HMC, IFANCA, JAKIM, or ESMA logo means the source has been independently audited. The E-code is confirmed halal in this product.
Neither? Here's what to do next:
Put it back and look for a certified alternative on the same shelf.
Check for products carrying an HFA, HMC, or IFANCA logo, or labelled "suitable for vegans". Either confirms a safe source.
Did you find a certified alternative?
Verified halal alternatives:
Browse halal alternatives on AmazonAmazon Associate — we earn from qualifying purchases.
About E337
Miscellaneous - tartaric acid and its salts it is Halal only if made from unfermented grapes such as in USA and canada. But in some countries it is made from the deposit on the wine wooden barrel then it will not be Halal.. Halal, if it is not obtained from wine by-product
Verification Required
This additive's halal status depends on its source. Check the product label for a halal certification mark, or contact the manufacturer directly.
What is E337 made from?
- tartaric acid + potassium and sodium hydroxide
Foods that commonly contain E337
Food Category Guide
E337 is common in processed cheese — see the full halal guide →
Always check the ingredient label on the specific product - manufacturers may change formulations.
Frequently Asked Questions
Is E337 (Potassium Sodium Tartrates) halal?
E337 (Potassium Sodium Tartrates) is classified as Mushbooh (Questionable). Source-dependent and requires verification. This additive may be derived from either halal (plant/synthetic) or haraam (animal) sources. Always check the product label or contact the manufacturer to verify the source.
What is E337 used for?
E337 is used as a acidity regulator and sequestrant in food products.
What foods contain E337?
E337 (Potassium Sodium Tartrates) is commonly found in: processed cheese, baked goods, confectionery.
What is E337 made from?
E337 can be derived from the following sources: tartaric acid + potassium and sodium hydroxide.
What are the other names for E337?
E337 may appear on food labels as: Rochelle Salt, Potassium Sodium Tartrates.
antioxidants, phosphates, and complexing agents — 47 E-codes: 28 Halal, 1 Haraam, 18 Mushbooh
Related E-Codes in antioxidants, phosphates, and complexing agents
Show 9 more antioxidants, phosphates, and complexing agents E-codes
Free weekly guide
Know before you eat — wherever you are
Join Muslims worldwide who get our weekly halal food guide — ingredient alerts, certified brand updates, and products your family can buy without second-guessing.
This information is for educational purposes only. For religious rulings, consult a qualified Islamic scholar or halal certification authority. E-code classifications may vary by source, manufacturing process, and school of thought.