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Claim analyzed
Health“Based on an oral LD50 greater than 2000 mg/kg body weight, EJUPAX is classified under the Globally Harmonized System as acute oral toxicity Category 5 with hazard statement H303 ("May be harmful if swallowed").”
Submitted by Lively Robin 8289
The conclusion
Open in workbench →The evidence does not support this classification as stated. GHS Category 5 oral toxicity is tied to H303, but it requires an LD50 greater than 2000 mg/kg and no more than 5000 mg/kg. Saying only “greater than 2000 mg/kg” is insufficient, because a substance above 5000 mg/kg would typically not fall in Category 5 at all.
Caveats
- The claim omits the required upper bound of ≤5000 mg/kg for GHS acute oral toxicity Category 5.
- A correct Category 5/H303 mapping does not prove EJUPAX belongs in that category unless its actual LD50 falls within the full 2000–5000 mg/kg band.
- This wording can mislead users into treating “LD50 > 2000 mg/kg” as a complete GHS classification rule when it is only part of the criterion.
This analysis is for informational purposes only and does not constitute health or medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making health-related decisions.
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Sources
Sources used in the analysis
In the Globally Harmonized System, acute oral toxicity Category 5 covers oral LD50 values greater than 2000 mg/kg body weight, and the hazard statement used for this category is H303, “May be harmful if swallowed.”
Category 5 substances are anticipated to have an oral or dermal LD50 value in the range 2000–5000 mg/kg. The specific criteria for Category 5 are provided for substances with relatively low acute toxicity, but which may still pose a hazard to especially vulnerable populations.
The GHS lists acute oral toxicity Category 5 with the hazard statement "May be harmful if swallowed." The classification table shows "H303 | May be harmful if swallowed | Acute toxicity, oral | Category 5 | ... | Warning."
Category 5 covers chemicals with toxicities expected to fall in the range of oral and dermal LD50 of 2000 mg/kg to 5000 mg/kg. The oral hazard statement shown for Category 5 is: “May be harmful if swallowed.”
Acute toxicity values are expressed as approximate LD50 (oral) values or acute toxicity estimates (ATE). The oral converted acute toxicity point estimate for Category 5 is greater than 2000 mg/kg and less than or equal to 5000 mg/kg. Ingredients with an oral or dermal LD50 greater than 2000 but less than or equal to 5000 mg/kg are included in the ATE calculation.
The table shows: "H303 | May be harmful if swallowed | Acute toxicity, oral | Category 5 | None | Warning." This directly matches the claim's H303 / Category 5 relationship.
The summary table states: "H303 | May be harmful if swallowed | Acute toxicity, oral | Category 5 | None | Warning." It also lists H303 as the oral acute toxicity statement for Category 5.
Acute Toxicity Estimates (ATE) are numerical values used to classify substances and mixtures for acute toxicity based on oral, dermal, or inhalation exposure routes. For oral exposure, Category 4 is 300 < ATE ≤ 2000 mg/kg body weight; values above 2000 mg/kg are handled as Category 5 in many GHS implementations.
Acute Toxicity (Oral, Dermal or Inhalation) – Category 5. No pictogram. May be harmful. The oral LD50 range for Category 5 is anticipated to be between 2000 and 5000 mg/kg.
GHS Category 5 covers chemicals with toxicities expected to fall in the range of oral and dermal LD50 of 2000 mg/kg -5000 mg/kg, or equivalent doses for inhalation toxicity.[6] ... GHS Criteria, Signal Words, Pictograms and Hazard Statements ACUTE ORAL TOXICITY: ... Category 5 LD50 > 2000 mg/kg < 5000 mg/kg (See Note (e) to GHS Table 3.1.1.) WARNING No symbol May be harmful if swallowed[6].
The oral LD50 in rats was 2000 mg/kg bw. In rats, the dermal LD50 was greater than 4000 mg/kg bw, and the LC50 was greater than 5.3 mg/L.
In the female and male rats, the LD50 levels of GI between 24 and 48 h were determined as 7444.26-7878.50 mg/kg and 7203.58-7397.25 mg/kg, respectively.
The page explains that hazard statements are standardized phrases used on labels and gives the example that an acute toxicity oral Category 4 chemical uses "Harmful if swallowed." This supports the GHS category-to-statement mapping framework relevant to Category 5.
The trimethylsulfonium salt has a reported dermal LD50 of greater than 2000 mg/kg.
The agreed-upon acute oral LD50 cut points are 5, 50, 300, 2000, and 5000 mg/kg. GHS classifies a chemical into five hazard categories based on acute toxicity (LD50/LC50).
The 48-hour observation showed no deaths from the rats either at the dose of 2000 mg/kgBW or 5000 mg/kgBW; thus, it can be concluded that the extract is practically non-toxic by oral administration.
The page states: "H303* May be harmful if swallowed" and identifies it among GHS health hazard statements. It also lists the same statement in the oral acute toxicity section.
The MSDS HyperGlossary: Acute Toxicity ... Category 5, the acute toxicity classification of this material under the HCS would be a hazard not otherwise classified (HNOC) rather than Acute Toxicity under the HCS.[8] ... Under the GHS, Category 5 is used for chemicals with oral or dermal LD50 values between 2000 and 5000 mg/kg and is assigned the hazard statement H303 "May be harmful if swallowed" for the oral route.[8]
Unlike Category 1, substances in Category 5 have an oral and dermal LD50 in the range of 2,000–5,000 mg/kg, which is significantly greater than the cut-off values in Categories 1, 2, and 3.
Acute toxicity: Propoxur is highly toxic via the oral route, with reported LD50 values of approximately 100 mg/kg in rats and mice.
There are 5 acute toxicity categories under GHS although some jurisdictions (for example, the EU) have not implemented Category 5. The table below shows GHS classification criteria for acute toxicity for different routes.
Acute Lethality Category I: LD50 ≤ 200 mg/kg Category II: 200 mg/kg < LD50 ≤ 2000 mg/kg Category III: 2000 mg/kg < LD50 ≤ 5000 mg/kg Category IV: LD50 > 5000 mg/kg.[9] This categorization describes acute oral and dermal lethality bands that correspond broadly to regulatory toxicity categories, with Category III covering LD50 values between 2000 and 5000 mg/kg.[9]
Severe Acute Toxicity: Anticipated oral LD between 2000 and 5000 mg/kg; indications of significant effect in humans; any mortality at class 4; significant clinical signs at class 4. Category 5 is the lowest acute toxicity category in this scheme.
Acute Toxicity Oral: Category 4 ... H302: Harmful if swallowed.[3] ... Section 11: Toxicological Information Acute Toxicological Data Oral LD50 Rat: 330 mg/kg.[3] This safety data sheet illustrates assignment of GHS Acute Toxicity Oral Category 4 when oral LD50 is 330 mg/kg, associated with hazard statement H302 "Harmful if swallowed".[3]
(Rat, Male/Female) LD50: 1850 mg/kg body weight; 14 days (OECD 401: Acute Oral Toxicity; Experimental value). ATE US: 500 mg/kg body weight. Not a dangerous substance according to GHS.
If the oral LD50 of the test chemical is less than 300 mg/kg bw, it is classified consistent with GHS Category 3 oral hazard. If no adverse effects are seen up to 2000 mg/kg bw, the substance is not classified as acute oral toxicity; Category 5 applies only above 2000 mg/kg up to 5000 mg/kg.
This page states that it allows users to find a hazard statement and signal word based on GHS hazard category, including "acute oral toxicity category 5," indicating the standard category-to-statement lookup exists for that classification.
Acute Toxicity – Oral 3. H301 Toxic if swallowed. ... Oral LD50 >200 mg/kg (rat).[5] This SDS shows a substance classified as Acute Toxicity Oral Category 3 with hazard statement H301 "Toxic if swallowed" based on an oral LD50 greater than 200 mg/kg in rats, consistent with GHS Category 3 oral LD50 band (>50–300 mg/kg).[5]
Acute aquatic toxicity (Category 1). ... GHS Label Elements: Pictograms.[10] This SDS document demonstrates use of GHS categories and hazard statements for another hazard class (aquatic acute toxicity), providing context for how GHS classifications are presented on safety data sheets.[10]
· Acute toxicity: · LD/LC50 values that are relevant for classification: Oral LD50 >5,000 mg/kg (rat).[7] ... Aquatic Acute 1: Hazardous to the aquatic environment - acute aquatic hazard – Category 1.[7] This SDS shows an example where a substance with oral LD50 > 5000 mg/kg in rats is not classified for acute oral toxicity under GHS, while it is classified for aquatic acute toxicity, illustrating the LD50 threshold above which no acute oral toxicity category is assigned.[7]
... LD50, 294, mg/kg, Rat, Oral, Male, NLM Hazardous Substances Data Bank (undated) ... 2000, mg/kg, Rat, Oral ...
The Wikipedia entry lists "H303 | May be harmful if swallowed" and "H303+H313+H333 | May be harmful if swallowed, in contact with skin or if inhaled," which corroborates the H303 wording but is less authoritative than primary standards sources.
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Debate
Two AI advocates debated this claim using the research gathered.
Argument for
Authoritative GHS references explicitly map Acute Oral Toxicity Category 5 to hazard statement H303 (“May be harmful if swallowed”) (Source 3, UNECE GHS Rev.10; Source 4/10, US EPA GHS criteria summary; Source 6/7, PubChem GHS tables). Those same standards define Category 5 as applying to relatively low acute oral toxicity with LD50 values above 2000 mg/kg body weight (typically 2000–5000 mg/kg), so an oral LD50 >2000 mg/kg for EJUPAX directly supports classifying it as GHS Acute Oral Toxicity Category 5 with H303 (Source 2, ILO Chapter 5; Source 5, SCHC; Source 26, NTP/ICCVAM).
The Proponent's argument relies on a logical leap by assuming a value "greater than 2000 mg/kg" automatically qualifies for Category 5, ignoring that GHS criteria strictly cap this category at 5000 mg/kg (Source 5, Source 10). By failing to establish that EJUPAX's LD50 is less than or equal to 5000 mg/kg, the Proponent overlooks the fact that any substance exceeding this upper limit is excluded from acute oral toxicity classification entirely (Source 26, Source 30).
Argument against
The claim is misleading because an oral LD50 value simply "greater than 2000 mg/kg" is insufficient for a Category 5 classification, as GHS standards explicitly require the value to also be less than or equal to 5000 mg/kg (Source 5, Source 10). Any substance with an oral LD50 exceeding 5000 mg/kg is completely excluded from acute oral toxicity classification under GHS (Source 26, Source 30).
The Opponent's argument commits a scope fallacy by treating the motion's premise (“LD50 greater than 2000 mg/kg”) as if it asserted “LD50 > 5000 mg/kg,” even though the cited GHS criteria define Category 5 as the band above 2000 mg/kg up to 5000 mg/kg and pair it with H303 (Source 3; Source 2; Source 10; Source 5). Moreover, the Opponent's reliance on the “>5000 mg/kg = not classified” point (Source 30; Source 26) is non-responsive to the motion's classification mapping—Category 5 ↔ H303—whose correctness is directly affirmed by UNECE and other standards sources (Source 3; Source 4/10; Source 6/7).
Panel Review
3 specialized AI experts evaluated the evidence and arguments.
Reviewer 1 — The Logic Examiner
The claim asserts that an oral LD50 greater than 2000 mg/kg qualifies EJUPAX for GHS Category 5 with H303. The evidence from multiple authoritative sources (UNECE, EPA, ILO, SCHC, PubChem) consistently confirms that GHS Category 5 covers oral LD50 values in the range of 2000–5000 mg/kg and is paired with H303 ('May be harmful if swallowed'). The opponent's logical point is valid: the claim's phrasing 'greater than 2000 mg/kg' is technically incomplete because it omits the upper bound of ≤5000 mg/kg, meaning a substance with LD50 >5000 mg/kg would not qualify for Category 5 at all. However, the core mapping — Category 5 ↔ H303 — is unambiguously supported by all authoritative sources, and the claim's inferential chain is sound for any LD50 falling within the 2000–5000 mg/kg band. The opponent's rebuttal correctly identifies a precision gap (the missing upper bound), but this is a scope/precision issue rather than a fundamental logical fallacy in the claim's reasoning about the Category 5/H303 relationship itself. The claim is mostly true in its core assertion but contains an inferential gap by not specifying the upper LD50 bound, which could lead to misclassification for substances with LD50 >5000 mg/kg.
Reviewer 2 — The Source Auditor
Highly authoritative international standards from UNECE (Source 3) and the ILO (Source 2) confirm that GHS Acute Oral Toxicity Category 5 corresponds to hazard statement H303 ('May be harmful if swallowed') and covers oral LD50 values in the range of 2000 to 5000 mg/kg. Because the claim specifies a classification based on an oral LD50 greater than 2000 mg/kg (which is the lower bound of Category 5), the mapping of this threshold to Category 5 and the H303 hazard statement is correct.
Reviewer 3 — The Precision Analyst
The evidence supports that Acute Oral Toxicity Category 5 is associated with hazard statement H303 (“May be harmful if swallowed”) (Sources 3, 4/10, 6/7), but it defines Category 5 as an LD50 band of >2000 and ≤5000 mg/kg (Sources 2, 5, 10, 26), not merely “greater than 2000 mg/kg” without an upper bound. Therefore, the claim overstates what can be concluded from the premise “LD50 > 2000 mg/kg” and is false as worded because EJUPAX could instead be unclassified for acute oral toxicity if LD50 > 5000 mg/kg (Sources 26, 30).