The question of whether scorpion venom or snake venom is more dangerous arises because both animals are popularly described with the same word, poisonous. Biologically, however, the two secretions are quite different mixtures: their composition, molecular size, mode of action and the amount delivered into the body are not alike. For the distinction between the terms, see the article on the difference between venom and poison; this article compares the two venoms.
First, an important note: there is no single answer to the question of which is more dangerous. The outcome depends on the species itself, the amount delivered, the person's age and health and the time it takes to reach medical care. The right step after a sting or bite is the same in both cases: stay calm, keep the affected area still and call the emergency number (112 in Türkiye and the EU).
Scorpion venom: a mixture of small peptides
In the Buthidae family, which includes most medically important scorpions, the prominent components of the venom are small peptides that target ion channels in nerve and muscle cells. Toxins that alter the function of sodium channels and toxins that block potassium channels are the two most studied families in this mixture. These peptides are small molecules of a few kilodaltons and are robust because they are tightly folded by disulfide bridges.
Alongside them, the venom also contains enzymes, salts and small molecules. In the reference batch analysis of our facility, 37 protein and peptide peaks were separated by RP-HPLC, bands in the 10–25 kDa range and an intense band at 37 kDa were seen on SDS-PAGE, and the potassium channel blocker α-KTx 3.6 was identified. On standard SDS-PAGE gels, peptides of a few kilodaltons often cannot be resolved as separate bands; the bands seen on the gel belong to the larger protein components of the venom, while small peptides are followed by chromatography and mass spectrometry. The family that acts on the sodium channel is described in the article on sodium channel toxins.
Snake venom: a mainly enzymatic mixture
Snake venoms contain a much broader range of proteins. A comprehensive review comparing the venom proteomes of different species showed that four families make up most of the composition: phospholipase A2 enzymes, metalloproteinases, serine proteases and three-finger toxins (Tasoulis and Isbister, Toxins, 2017). A large share of these enzymes are molecules several times larger than scorpion peptides.
The mode of action varies with the snake family. In vipers (Viperidae), effects that damage tissue and disrupt blood clotting predominate, whereas in elapids (Elapidae), three-finger toxins that block transmission between nerve and muscle are decisive. Most medically important snakes in Türkiye belong to the viper family.
The two mixtures also have points in common. The enzyme L-amino acid oxidase is a well-known component of snake venoms; it is also listed as a component, L-amino acid oxidase (CAS 9000-89-9), in our facility's safety data sheet.
Comparison table
| Property | Scorpion venom (Buthidae) | Snake venom |
|---|---|---|
| Prominent components | Small peptides that target ion channels | Phospholipase A2, metalloproteinase, serine protease and three-finger toxins |
| Molecular size | Mostly a few kilodaltons | From small toxins to enzymes of tens of kilodaltons |
| Main effect | Affecting the nervous system by disrupting ion channel function | Depending on the family, tissue damage, clotting disorders or blocked nerve-muscle transmission |
| Delivery apparatus | The sting at the tip of the tail (telson) | Venom fangs |
| Amount delivered | Usually very small | Usually larger |
| Antivenom | Specific to scorpion species | Specific to snake species |
Antivenoms are not interchangeable
Antivenoms are antibody preparations developed against the venom of specific species, and their effect is limited to the venoms they were prepared against. Snake antivenom is not used against scorpion venom, nor is scorpion antivenom used against snake venom. Decisions on and administration of treatment rest solely with healthcare facilities; how antivenom is produced is explained in the article on antivenom production.
Two venoms in research
Both venoms are valuable resources in biomedical research. Snake venoms stand out particularly in the study of enzymes involved in blood clotting and tissue breakdown, and scorpion venoms in studies aimed at understanding the structure and function of ion channels. In both fields, the species, origin and analysis of the material used must be known. The Androctonus turkiyensis crude venom supplied by our facility is for research and industrial use only; product information is on the Products page, and how toxicity values are read is explained in the article what is LD50.
