Resparkle ingredients: what's actually in our powder

Coffee stain before-and-after on a cream cable-knit sweater, the Resparkle ingredient combo at work

By the Resparkle team, a small family business based in Brisbane. Last updated: 2026-05-26.

TL;DR

Eight ingredients. Every one rated 1 or 2 on the Environmental Working Group hazard scale (the lowest-toxicity tier). No SLS, no optical brighteners, no synthetic fragrance, no fillers. Here's the full list, what each ingredient does, and why it's in the formula.

Why ingredient transparency matters

The ACCC has been actively prosecuting vague environmental marketing in Australia. Saying a product is "natural" or "non-toxic" without published evidence is increasingly a compliance risk, not just a credibility one. The Environmental Working Group (EWG) rates household chemical ingredients on a 1 to 10 hazard scale, where 1 to 2 is the lowest-toxicity tier and 10 is the highest concern.

For households shopping for a low-tox laundry powder, the ingredient list is the single most useful thing to read. Not the marketing panel on the front of the bag. Not the "plant-based" badge. The ingredient list.

Resparkle publishes ours in full, with EWG ratings, because we believe customers making informed choices deserve to see exactly what they're washing their family's clothes in.

The full Resparkle Natural Laundry Powder ingredient list

This is every ingredient in Resparkle Natural Laundry Powder, its EWG hazard rating, and what it actually does in the wash.

Ingredient EWG rating Function
Sodium Carbonate 1 Cleaning and sanitising builder. Raises wash-water pH to help surfactants lift soil from fabric. Also known as washing soda, one of the oldest cleaning agents in use.
Sodium Percarbonate 1 Oxygen bleach. Releases hydrogen peroxide in water, which breaks down stain chromophores without chlorine. More effective at 40°C and above; for cold washes, it provides a milder lift.
Coconut Surfactant 1 The primary cleaning agent. Derived from coconut oil. Reduces water surface tension so it can penetrate fabric and carry away soil. Not SLS, not a petrochemical-derived surfactant.
Sodium Carboxymethyl Cellulose 1 Stain remover and anti-redeposition agent. Holds loosened soil in suspension in the wash water so it rinses out instead of re-depositing on fabric.
Sodium Metasilicate Pentahydrate 2 Builder. Softens water, enhances surfactant performance, and protects machine components from corrosion. The only ingredient in the formula rated 2 (still the lowest-hazard tier).
Sodium Citrate 1 Chelating agent. Binds to hard-water mineral ions (calcium, magnesium) that would otherwise interfere with surfactant performance. Derived from citric acid.
Natural Enzyme Blend 1 Breaks down protein-based stains (blood, grass, egg) and starch-based stains (food residue). Enzymes are the reason the formula works in cold water on biological soils.
Essential Oil Blend n/a Fragrance (Lemon Eucalyptus variant only). Australian lemon eucalyptus oil. Absent in the Fragrance-Free variant.

Eight ingredients. Seven rated EWG 1, one rated EWG 2, one fragrance component (present only in the scented variant, absent in the Fragrance-Free).

For independent EWG ratings, cross-reference the EWG Skin Deep database. Each ingredient above is searchable by name.

What's deliberately not in our formula

The ingredients a formula leaves out matter as much as the ones it includes. Here is what you will not find in Resparkle laundry powder and why each was excluded.

Sodium Lauryl Sulphate (SLS) and Sodium Laureth Sulphate (SLES). Synthetic surfactants derived from petroleum and often from palm oil processing. SLS rates EWG 4 and is a known skin irritant at laundry concentrations. SLES rates EWG 3. Our surfactant is coconut-derived and rated EWG 1.

Optical brighteners. UV-reactive chemicals that make fabric appear whiter under light. They don't clean, they coat fabric. EWG rates common optical brighteners 5 to 8. They are not biodegradable and accumulate in waterways. We don't use them.

Synthetic fragrance. Fragrance compounds on an ingredient label can represent hundreds of undisclosed individual chemicals. Some are linked to endocrine disruption at EWG levels 5 to 8. Our scented variant uses Australian lemon eucalyptus essential oil only. Our Fragrance-Free variant contains no fragrance component at all.

Fillers (sodium sulphate, etc.). Sodium sulphate is used in many conventional and "eco" powders to add bulk and improve flowability. It contributes nothing to cleaning. We don't use it, which is why our powder doses at 2 to 3 teaspoons per load rather than a tablespoon or more. For the dose math in full, see how much laundry powder per load.

Phosphates. Banned in Australian detergents since the early 2000s for their role in waterway eutrophication. Not in our formula.

Parabens, chlorine, ammonia, dyes. None present. Not relevant to laundry powder performance, and each carries documented concerns at EWG 3 to 7.

For sensitive households

If you're shopping specifically for eczema, sensitive skin, infant laundry, or asthma, the two variants serve different needs.

Fragrance-Free: the safer default for reactive households. No essential oil at all. Every ingredient is rated EWG 1. For families with eczema or asthma, this is the variant we'd recommend starting with.

Lemon Eucalyptus: the scented variant uses Australian lemon eucalyptus essential oil. Essential oils can be sensitisers in a small number of people with severe fragrance sensitivity. If you or your family have a documented fragrance allergy, start with the Fragrance-Free variant.

Both variants are septic-tank safe and greywater safe.

For the full sensitive-skin context, including a comparison of eco laundry powders for eczema households, see best natural laundry detergent for eczema in Australia 2026.

The patented formula

Resparkle Natural Laundry Powder uses a patented, proprietary bio-tech formula. The patent covers the combination and ratios of active cleaning ingredients, which is what allows the concentrated dose (2 to 3 teaspoons) to outperform conventional detergents in the lab.

For anyone asking whether "natural" can actually outperform conventional: the answer is in the lab result. Independently tested against CHOICE's #1-rated supermarket detergent on five common stains. It outperformed on all five.

Frequently asked questions

Are Resparkle's ingredients really EWG-rated 1 or 2? Yes. Seven of eight ingredients rate EWG 1. One rates EWG 2 (Sodium Metasilicate Pentahydrate). The fragrance component (Essential Oil Blend, scented variant only) does not carry an EWG numeric rating because it is a natural extract, not a synthesised compound.

Is Sodium Percarbonate safe for coloured clothes? Yes. Sodium Percarbonate is an oxygen bleach, not a chlorine bleach. It is generally safe for coloureds at standard wash temperatures. At very high temperatures (above 60°C) with prolonged exposure, some colour loss is possible, as with any bleaching agent. Standard 30 to 40°C washes carry no colour risk with normal doses.

What does Sodium Metasilicate Pentahydrate actually do, and is it safe? It's a builder: it softens water, boosts surfactant performance, and protects washing machine components. The EWG 2 rating reflects mild skin irritation risk on direct contact with the raw ingredient in powder form. In diluted wash water at laundry concentrations, it is considered safe for use on fabric and skin. It is also used in food-grade dishwasher detergents.

Is the formula vegan and cruelty-free? All ingredients are plant-derived or mineral-origin. No animal-derived ingredients. No animal testing.

Is this the same formula in both the 600g and the 4 × 600g pack? Yes, identical formulation across all sizes.

Try it

The full ingredient story is only as useful as the product in the wash. If you want to test it in your household:

Shop Resparkle Natural Laundry Powder (600g, 55 washes, $18, or 4 × 600g for $72).

For new households, the Complete Laundry Bundle pairs the powder with a 700g stain remover, also EWG-rated, also compostable packaging.

Further reading

Sources

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