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Brand founded in India, 1965 · about the brand
STIM Spark Instant Whitening Toothpaste
Decode Label Safety Score
How we got 5.0 ShowHide
Reviewed 6 times · Methodology v3.1 (updated 8 Oct 2026) — what changed
This toothpaste offers effective cleaning and fluoride protection against cavities, making it suitable for most adults and older children. However, the presence of Sodium Lauryl Sulfate (SLS) may cause irritation for individuals with sensitive gums or a history of canker sores. The undisclosed 'Fragrance' also poses a potential allergen risk for those with fragrance sensitivities. Younger children require careful supervision due to the fluoride content.
At a glance
From the declared label — not a lab testFindings to weigh
What’s favorable
- Hydrated Silica
- Sodium Fluoride
Contains irritant surfactant and undisclosed fragrance; fluoride for cavity protection.
This toothpaste contains Sodium Lauryl Sulfate (SLS), a surfactant known to irritate sensitive gums and mucous membranes, as classified by the EU SCCS. It also includes an undisclosed 'Fragrance' blend, which can be a common allergen for sensitive individuals. While it provides effective cavity protection with fluoride, those with sensitivities should consider alternatives.
Consider this product carefully if you are
- Avoiding certain additives or colours — Sodium Lauryl Sulfate is declared.
Concern breakdown
Score out of 10 · higher = fewer concernsHow this product performs on each concern we check for oral care. This is a breakdown of the same evidence behind the score above — not a separate verdict.
Triggered by CI 17200 — a synthetic colour on our aromatic-amine watch list (impurity risk). A colour-quality caution, not a finding that this product contains a carcinogen.
Other audiences
LimitContains fluoride — use only a pea-sized amount and supervise brushing to limit swallowing, as excessive ingestion can lead to fluorosis.
Why the score is capped
Primary surfactant with recognised irritation potential (EU SCCS)
Rule PC-CAP-05
Undisclosed fragrance (allergens not named)
Rule PC-CAP-06
What's good
Contains Sodium Fluoride for effective cavity protection
Uses Hydrated Silica for gentle yet effective cleaning
Includes Cocamidopropyl Betaine to potentially reduce irritation from SLS
Watch out for
Sodium Lauryl Sulfate (SLS) can be irritating to sensitive gums and mucous membranes
Undisclosed 'Fragrance' may trigger allergic reactions in sensitive individuals
Children under 6 require supervision due to fluoride content and swallowing risk
Sodium Saccharin — saccharin (INS 954) is a high-intensity, calorie-free sweetener, FSSAI/JECFA-approved with an established acceptable daily intake and considered safe within it. Some people prefer to limit or avoid intense sweeteners, so it is noted as a moderate, preference-level concern rather than a hazard.
CI 17200 — a synthetic colour (Colour Index dye) added purely for appearance — it gives the product no benefit for skin or health. Permitted at regulated levels, but synthetic dyes of this class are a recognised contact-irritant and sensitiser risk for some people, so they are noted as a moderate, subgroup-level concern rather than a general-population hazard.
CI 74160 — a synthetic colour (Colour Index dye) added purely for appearance — it gives the product no benefit for skin or health. Permitted at regulated levels, but synthetic dyes of this class are a recognised contact-irritant and sensitiser risk for some people, so they are noted as a moderate, subgroup-level concern rather than a general-population hazard.
Ingredient Concerns safety database
Sources cited below may be Indian (FSSAI) or international (EU, US, WHO, IARC) — an international classification or law is evidence, not an Indian regulatory finding.
Sodium Lauryl Sulfate
SLS is an aggressive surfactant that strips skin of its natural oils, disrupts the skin barrier, and can cause contact dermatitis, canker sores, and eye irritation. People with eczema, psoriasis, or sensitive skin should avoid SLS-containing products. It is particularly harsh in oral care products where it contacts mucous membranes.
Regulatory & scientific authority Source: SCCS; American Academy of Dermatology; Herlofson & Barkvoll 1996
Sodium Lauryl Sulfate: regulation, sources and other products →Fragrance
"Fragrance" or "parfum" is a catch-all term that can conceal a blend of hundreds of undisclosed chemicals, including known allergens, sensitisers, and potential endocrine disruptors. The EU now mandates disclosure of 82 specific fragrance allergens. People with fragrance sensitivity, asthma, or contact dermatitis should prefer fragrance-free products.
Regulatory & scientific authority Source: EU Regulation 2023/1545; IFRA
Fragrance: regulation, sources and other products →Decode Label Analysis
Sodium Lauryl Sulfate (SLS) is a strong surfactant and foaming agent known to be a skin and mucous membrane irritant, as classified by the EU SCCS. It may cause irritation, dryness, or canker sores in sensitive individuals.
The product contains 'Fragrance' without specific disclosure of its components. Fragrance blends can contain numerous chemicals, many of which are common allergens and sensitizers for some individuals.
Combined Effects interactions
Cocamidopropyl Betaine can help mitigate some of the irritation potential of Sodium Lauryl Sulfate, though SLS remains a primary irritant.
Claim check
Front-of-pack marketing claims checked against this product's actual ingredients and nutrition. "Can't verify" means the label does not provide enough information to check the claim — it is not the same as the claim being false.
The label declares Hydrated Silica, which lifts surface stains by mild abrasion — it is not a bleaching agent, so it can make teeth look cleaner but does not lighten the tooth itself. How much whitening that delivers can’t be read off the label.
The label declares Hydrated Silica, which lifts surface stains by mild abrasion — it is not a bleaching agent, so it can make teeth look cleaner but does not lighten the tooth itself. How much whitening that delivers can’t be read off the label.
The term 'purple tech' is a proprietary or marketing term that cannot be matched to a specific listed ingredient or verified from the ingredient list.
The label declares Hydrated Silica, which lifts surface stains by mild abrasion — it is not a bleaching agent, so it can make teeth look cleaner but does not lighten the tooth itself. How much whitening that delivers can’t be read off the label.
The label declares Hydrated Silica, which lifts surface stains by mild abrasion — it is not a bleaching agent, so it can make teeth look cleaner but does not lighten the tooth itself. How much whitening that delivers can’t be read off the label.
Enamel safety depends on how abrasive the paste is (its RDA value), which the pack doesn’t state — no ingredient list can confirm or deny it. Fluoride in the formula supports enamel, but that is a different property from being non-abrasive.
Read straight from the back-of-pack photo — quantities, sections and any disguised terms, so the small print can’t hide behind the marketing.
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1.
Sorbitol
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2.
WaterAqua
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3.
Hydrated Silica
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4.
Sodium Lauryl SulfateSodium Lauryl Sulphate
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5.
Cocamidopropyl Betaine
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6.
Fragrance undisclosed fragranceAroma
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7.
Tetrasodium Pyrophosphate
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8.
PEG-12
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9.
Potassium Hydroxide
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10.
Cellulose Gum
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11.
Sodium Fluoride
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12.
Sodium Saccharin
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13.
Phosphoric Acid
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14.
CI 17200 synthetic colour
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15.
CI 74160 synthetic colour
In label order — normally largest quantity first. Select a row for the full write-up and sources.
✓ Decode Label Assessment: Favorable ⚠ Decode Label Assessment: Concern Decode Label Assessment: Neutral
Who should take caution
About this ingredient
No detailed safety data in our database yet for this ingredient.
Learn More
Compare with other toothpaste products
Assessed using the same Decode Label methodology, sorted by score. Each score reflects the information available for that product at the time of assessment.
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What are the ingredients in STIM Spark Instant Whitening Toothpaste?
The label of STIM Spark Instant Whitening Toothpaste lists 15 ingredients, in label order: Sorbitol, Water, Hydrated Silica, Sodium Lauryl Sulfate, Cocamidopropyl Betaine, Fragrance, Tetrasodium Pyrophosphate, PEG-12, Potassium Hydroxide, Cellulose Gum, Sodium Fluoride, Sodium Saccharin, Phosphoric Acid, CI 17200, CI 74160. Flagged by the analysis: Sodium Lauryl Sulfate, Fragrance, Sodium Saccharin, CI 17200, CI 74160.
Is STIM Spark Instant Whitening Toothpaste safe to use?
STIM Spark Instant Whitening Toothpaste scores 5.0/10 on Decode Label (Moderate). This toothpaste contains Sodium Lauryl Sulfate (SLS), a surfactant known to irritate sensitive gums and mucous membranes, as classified by the EU SCCS. It also includes an undisclosed 'Fragrance' blend, which can be a common allergen for sensitive individuals. While it provides effective cavity protection with fluoride, those with sensitivities should consider alternatives.
Why does STIM Spark Instant Whitening Toothpaste score 5.0/10?
Flagged in the score: Sodium Lauryl Sulfate (SLS) can be irritating to sensitive gums and mucous membranes. Undisclosed 'Fragrance' may trigger allergic reactions in sensitive individuals. Also noted: Children under 6 require supervision due to fluoride content and swallowing risk.
Who should avoid STIM Spark Instant Whitening Toothpaste?
The points the analysis notes are most relevant to: Sensitive gums; Recurrent canker sores; Fragrance allergy; Children under 6 (unsupervised use).
Does STIM Spark Instant Whitening Toothpaste contain fragrance?
Yes — the ingredient list includes Fragrance. Fragrance is declared as a single ingredient, so the individual scent chemicals in it are not named. This matters mainly if you have sensitive skin or a known fragrance allergy.
Are the claims on the STIM Spark Instant Whitening Toothpaste pack accurate?
Decode Label checked 6 claims against the ingredient list and nutrition panel. "flash forward with INSTANT WHITENING TOOTHPASTE" — can't be verified from the label. "FOR INSTANTLY WHITER TEETH*" — can't be verified from the label. "powered by purple tech" — can't be verified from the label.
Answers are generated from this product's own Decode Label analysis — the score, the ingredient list and the label claims shown above. Always check the pack itself for allergen and dietary information.
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About this analysis: Based on declared label information and available evidence. Decode Label does not independently laboratory-test products, and a score is not a regulatory determination or medical advice.
Disclaimer: Safety scores are Decode Label-generated assessments based on publicly available regulatory data (FSSAI, WHO, EFSA, IARC) and peer-reviewed research. They are not a substitute for professional medical advice, and they are not a regulatory determination, a laboratory safety certification or a medical diagnosis. Ingredient safety can vary by individual health conditions, concentration, and usage context. Decode Label is an independent information service and scores every brand by the same rules. No brand pays for or influences its score. Our founder also founded the personal-care brand Botani Bestie (see our story); its products are scored exactly like everyone else's. Data limitations: This assessment is based on the information declared on the product label and the evidence sources above — Decode Label does not independently laboratory-test this product. Ingredient concentrations, sourcing and manufacturing can vary between batches and are not always disclosed. A finding that is not shown here means it was not identified from the available label information, not that it has been ruled out.
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