Viva Blu’s Citric Acid Anhydrous is a premium-grade product sourced from trusted suppliers, designed for use across a wide range of industries and home applications. From food and beverage production to cosmetics, cleaning, agriculture, and water treatment, citric acid is a safe and effective solution for everyday needs.

In addition to its many uses, our citric acid is highly effective as a pool stain remover, helping to tackle tough mineral and metal stains on pool surfaces and restoring clarity to your water.

Common Uses of Citric Acid Anhydrous:

Pool Care: Dissolves and removes stubborn stains caused by metals and minerals.
Cleaning Products: Excellent for descaling and removing limescale from sinks, taps, showerheads, and appliances.
Beverages & Food: Natural preservative and flavour enhancer in soft drinks, juices, and baked goods.
Food Preservation: Maintains freshness and prevents discolouration in canned and preserved foods.
Bath Bombs & Cosmetics: Creates the signature fizz in bath bombs and acts as a pH adjuster in skincare.
Cooking & Baking: Adds a tangy flavour to recipes and works as a leavening agent in certain baked goods.
DIY Cleaning: Combine with natural ingredients to make effective, eco-friendly household cleaners.
Dishwashers & Laundry: Softens water, boosts cleaning power, and helps remove stubborn stains.
Deodorising: Neutralises unpleasant odours in refrigerators, drains, and bins.

Whether you need bulk quantities for commercial use or smaller packs for home projects, Viva Blu offers competitive pricing, reliable service, and fast delivery across Australia.

How to Remove Pool Stains with Citric Acid

Citric acid is a gentle yet effective way to treat stubborn stains in your pool. Here’s a simple process:

Lower chlorine levels in your pool to near zero (citric acid won’t work effectively with high chlorine).
Adjust pH to around 7.2 for best results.
Dissolve citric acid: Mix 500g of citric acid in a bucket of warm water for every 40,000L of pool water.
Distribute evenly by pouring the solution around the pool edges.
Run the pump for 1-2 hours, then turn it off and let the water sit for 12-24 hours. Stains will begin to lift.
Brush stained areas lightly to assist removal.
Rebalance water chemistry (pH, chlorine, and alkalinity) after treatment.

Tip: Always test on a small area first and follow pool safety practices when handling chemicals.

DIY Bath Bomb Recipe with Citric Acid

Citric acid is a key ingredient in bath bombs, giving them their fizzy effect. Try this simple recipe:

Ingredients (makes 4-6 bath bombs):

1 cup baking soda
cup citric acid (anhydrous)
cup cornstarch
cup Epsom salts
3 tbsp coconut oil (melted)
1 tsp water
10-15 drops essential oil (e.g., lavender, eucalyptus, or citrus)
A few drops of food colouring (optional)

Method:

In a large bowl, mix the dry ingredients (baking soda, citric acid, cornstarch, and Epsom salts).
In a separate bowl, combine the coconut oil, water, essential oil, and colouring.
Slowly add the wet mixture into the dry mix, stirring constantly (avoid fizzing).
Press the mixture firmly into moulds (silicone moulds or even muffin trays work well).
Allow to dry for at least 24 hours before gently removing from moulds.

Drop one into a warm bath, and enjoy the fizzing and skin-softening benefits.

Technical Reference

Technical Specifications

Property	Detail
Chemical Name	Citric Acid Anhydrous
IUPAC Name	2-hydroxypropane-1,2,3-tricarboxylic acid
Common Names	Citric acid, anhydrous citric acid, E330
Molecular Formula	C₆H₈O₇
Molecular Weight	192.12 g/mol
CAS Number	77-92-9
Grade / Purity	Multi-purpose grade; minimum 99.5% purity (anhydrous basis)
Physical State	Solid
Appearance	White to off-white crystalline granules or fine powder; odourless
Bulk Density	Approximately 750–850 kg/m³ (granular form)
Melting Point	153–159°C
pH (1% aqueous solution)	Approximately 2.2–2.5 at 25°C
pH (10% aqueous solution)	Approximately 1.8–2.1 at 25°C
Solubility in Water	592 g/L at 20°C; fully miscible in water
UN Number	Not classified as dangerous goods for transport (non-regulated)
ADG Class	Not subject to ADG Code — not a classified dangerous good
GHS Hazard Classification	Not classified as hazardous under the GHS/WHS Regulations in solid form at standard concentrations; mild irritant at higher concentrations or in concentrated solution

Applications & Use Cases

Swimming Pool & Spa Care: Removal of iron, copper, calcium, and manganese staining from pool surfaces including fibreglass, concrete (marcite/pebblecrete), and vinyl liner pools; spot treatment of waterline stains; lowering localised pH for stain dissolution without aggressive acid washing
Descaling & Limescale Removal: Domestic and commercial descaling of kettles, coffee machines, dishwashers, evaporative coolers, showerheads, tapware, and heat exchangers; removal of calcium carbonate and magnesium scale deposits
Water Treatment: pH reduction and adjustment in cooling tower make-up water; chelation of metal ions to prevent scale formation in process water systems; boiler passivation and pre-commissioning cleaning
Food & Beverage Manufacturing: Acidulant, flavour enhancer, and preservative in beverages, confectionery, jams, sauces, and dairy products (E330); pH buffering in food processing
Cleaning Product Formulation: Active ingredient in commercial and domestic cleaning formulations including bathroom cleaners, toilet bowl cleaners, dishwasher powders/tablets, and eco-friendly descalers
Cosmetics & Personal Care: pH adjuster in shampoos, conditioners, skin care formulations, and bath products; chelating agent to improve product stability and efficacy
Agriculture & Horticulture: Acidification of irrigation water to optimise nutrient availability; prevention of calcium and magnesium precipitation in fertigation systems; cleaning of irrigation lines and emitters
Industrial & Manufacturing: Metal surface treatment and passivation (particularly stainless steel); soldering flux formulations; electroplating bath pH adjustment; textile and leather processing
Pharmaceutical & Laboratory: Buffering agent; excipient in effervescent tablets and oral formulations; reagent-grade applications where food/multi-purpose grade meets purity requirements
Homebrewing & Winemaking: Acidification of must and wort; water chemistry adjustment; equipment sanitisation support

Dosing Rates & Guidelines

Application	Minimum Effective Dose	Typical Dose	Maximum Recommended Dose	Units	Notes
Pool stain removal — localised spot treatment	—	Apply directly as granules or concentrated paste (50–100 g per 100 cm² of stained area)	—	g per stained area	Apply directly to dry or drained surface; allow 5–30 min contact time; brush and rinse. For fibreglass and vinyl, test a small area first. Do not use on acid-sensitive surfaces (e.g., natural stone coping) without testing.
Pool stain removal — full pool treatment (iron/copper staining)	2 kg per 50,000 L	4–6 kg per 50,000 L	10 kg per 50,000 L	kg per pool volume	Dissolve in a bucket of water before adding to pool. Reduce pool pH to 6.8–7.0 before treatment. Run filtration continuously. Monitor pH. After stain removal, re-balance water chemistry (pH 7.2–7.6, total alkalinity 80–120 mg/L as CaCO₃) before returning to normal use. Not a substitute for professional acid washing.
Descaling — domestic appliances (kettle, coffee machine)	10 g per litre of water	20–30 g per litre	50 g per litre	g/L	Fill appliance with solution; allow 20–60 min soak; run cycle if applicable; rinse thoroughly with fresh water ×2 before use. Effective against calcium carbonate (limescale) scale.
Descaling — showerheads & tapware	30 g per litre	50 g per litre	100 g per litre	g/L	Submerge fitting in solution or apply via soaking bag; 30–120 min contact time depending on scale severity. Rinse thoroughly before use.
Descaling — commercial heat exchangers & cooling tower pipework	2% w/v	5–10% w/v	15% w/v	% w/v (g per 100 mL solution)	Circulate solution at 40–60°C for 2–8 hours depending on scale load; check scale dissolution by monitoring pH rise and conductivity. Neutralise and dispose of waste solution in accordance with local trade waste requirements. Consult a water treatment specialist for CIP (clean-in-place) circuit design.
Irrigation water acidification (pH adjustment)	0.1 g/L	0.2–0.5 g/L	1.0 g/L	g/L (mg/L equivalent: ×1000)	Target irrigation water pH 5.5–6.5 depending on crop and nutrient programme. Always test resultant pH before applying to plants. Citric acid is biodegradable and does not persist in soil.
Food & beverage acidulation (general guidance)	0.5 g/L	1–5 g/L	Per FSANZ Food Standards Code (Schedule 3)	g/L	Comply with Australia New Zealand Food Standards Code — citric acid (E330/INS 330) is permitted in Schedule 3. Specific maximum limits apply per food category. Confirm with a food technologist for regulated applications.
General cleaning solution (surfaces, grout, scale)	2% w/v (20 g/L)	5–10% w/v (50–100 g/L)	15% w/v (150 g/L)	g/L	Apply via spray bottle or mop. Allow 5–15 min dwell time. Do not use on marble, limestone, or unsealed natural stone — citric acid will etch calcium carbonate-based surfaces. Rinse thoroughly.
Stainless steel passivation	4% w/v	8–10% w/v at 50–60°C	10% w/v	% w/v	Immerse or circulate at 50–60°C for 30–60 min per ASTM A967/A380 guidance. Rinse with deionised or clean water; allow to air-dry. Citric acid passivation is an effective alternative to nitric acid passivation for stainless steel grades 304 and 316.

Note: All dosing rates are indicative and based on standard Australian industry practice. Site-specific conditions including water hardness, temperature, scale type, contact time, and surface material will affect performance. Always conduct a trial application on a small or non-critical area before full-scale treatment.

Dilution Instructions

General Principles

Citric acid anhydrous is a solid organic acid. When dissolved in water, it generates a mildly exothermic reaction that is generally low-risk at typical use concentrations, but care should still be taken with concentrated solutions above 10% w/v.
Always add citric acid to water — not water to acid. While this is less critical for citric acid than for mineral acids such as hydrochloric or sulphuric acid, this practice is sound standard procedure and prevents localised hot-spotting in concentrated preparations.
Use clean, cool water (below 30°C for initial dissolution; warm water up to 60°C can be used to accelerate dissolution for descaling applications).
Do not prepare concentrated solutions (above 15% w/v) in sealed containers — allow for any minor gas exchange.

Equipment Required

Chemical-resistant mixing container (HDPE, polypropylene, or stainless steel)
Graduated measuring jug or calibrated scales (for accurate dosing)
Chemical-resistant stirring rod or paddle (HDPE or stainless steel)
Appropriate PPE (see Safety & Handling section below)
pH indicator strips or a calibrated pH meter (recommended for critical applications)
Clean potable or process water as appropriate to the application

Step-by-Step Dilution Procedure

Don PPE — chemical splash goggles, nitrile gloves, and a lab coat or appropriate protective clothing before handling.
Measure the required volume of water into the mixing vessel first. Use the dosing table above to calculate the required water volume for your target concentration.
Weigh the required quantity of citric acid anhydrous using calibrated scales. Example: To prepare 1 litre of a 10% w/v solution, weigh 100 g of citric acid.
Slowly add the citric acid granules to the water while stirring continuously. Do not add all at once for volumes greater than 500 g — add in portions to manage dissolution rate and minor heat generation.
Stir until fully dissolved. Citric acid dissolves readily in water at ambient temperature. For concentrations above 50 g/L in cold water, gentle warming to 30–40°C will accelerate dissolution. Do not boil.
Verify concentration or pH with a calibrated pH meter or pH strips where the application requires a specific pH target (e.g., pool water treatment, irrigation, food-contact applications).
Label the container clearly with: product name, concentration, date of preparation, and hazard information. Do not store prepared solutions in unlabelled or food containers.
Use promptly or store appropriately. Prepared aqueous solutions of citric acid are stable but may support microbial growth over extended periods at low concentrations. Store in sealed, labelled HDPE containers, away from heat and direct sunlight.

Quick Reference Dilution Table

Target Concentration	Citric Acid Anhydrous	Water Volume	Typical Application
2% w/v	20 g	Make up to 1 litre	Light general cleaning, mild descaling

Weight	26 kg
Dimensions	48.8 × 38.8 × 20.1 cm
Weight	10kg, 25Kg, 5kg

0402 981 808

0402 981 808

Citric Acid Anhydrous – Multi-Purpose