Citric Acid Powder: Purity, Ratios, INCI and CAS for Bath Bombs

Citric acid powder for bath bombs is being sold in several distinct grades and package sizes, and makers need to know how those differences affect fizz, labeling and sourcing. Five suppliers name the ingredient INCI as Citric Acid, link the acid-plus-baking-soda reaction to bath fizz, and provide practical shipping, storage and purity claims that matter whether you craft single batches or buy by the truckload.

Wholesale Supplies Plus and Soapandthings call the product a super-fine, harder-to-find powder ideal for bath bombs. Wholesale Supplies Plus states, “This citric acid is not your typical powder. It is the harder to find and super fine which makes them best for bath bombs. Our Citric Acid is derived from corn. ... When mixed in appropriate amounts with baking soda, it produces a chemical reaction that leads to the fizz in bath bombs. We only stock Jungbunzlauer F6000 material.” Soapandthings repeats the super-fine description and gives a concrete mixing guideline: “Bath Fizzies: 2 parts Baking Soda to 1 part Citric Acid.”

Candlecocoon lists the product as “Citric Acid Powder - USP Anhydrous,” supplies CAS# 77-92-9, and notes the powder is “Soluble in Water” and a “dry, crystalline, odorless substance with a strong acidic taste.” Candlecocoon also provides shelf-life and storage instructions: store at room temperature in an air tight container, and “Best Used By: One year from date of purchase.” Candlecocoon’s small-package pricing shows 2 oz at $1.95 and 1 lb at $4.95, and the site warns that bulk-size shipping “averages 7-10 Business Days” and multiple shipments may occur, with bulk shipping billed to the buyer.

Bulk Apothecary frames itself as a large U.S. supplier offering sizes “ranging from 1lb. all the way up to full truckloads,” and markets “99.9% pure citric acid” as “food grade.” Bulk’s customer comments include craft and household uses: Kevin Edwards wrote on 23rd Jan 2026, “I love this vegan citric acid it its a huge part of the success of my butter bomb line paired with the aluminum free sodium bicarbonate that bulk apothecary sales.” Other reviewers report dishwasher and distiller cleaning uses and bath-bomb performance, including Darlene Batwinski on 27th Nov 2025: “Works as it should for bath bombs. My bath bombs are nice and hard! No problems with this citric acid!”

Soapy Twist, operating in India, markets anhydrous citric acid as “Must-Have for DIY Bath Bombs” with “Guaranteed Purity,” offers COD up to Rs.2000, “FREE DELIVERY PAN INDIA,” and lists contact options including phone numbers and email: +91 97181 80070, +91 9718180071, hey@soapytwist.com, and hours Monday - Saturday 10 AM to 7 PM.

Not all vendor statements align. Soapandthings lists Country Of Origin as United States while Candlecocoon lists country of origin as N/A; Wholesale Supplies Plus emphasizes corn-derived material and Jungbunzlauer F6000 stock. Verify certificates of analysis, safety data sheets and lot origin before labeling or buying large quantities. For practical use, follow the explicit 2 parts baking soda to 1 part citric acid ratio cited by Soapandthings, use a super-fine or small-grain anhydrous powder for smoother fizz, store product airtight at room temperature and plan for a one-year best-used-by window for purchased stock. Verify CoA and shipping lead times when moving from hobby batches to larger production.