[{"data":1,"prerenderedAt":211},["ShallowReactive",2],{"ingredient-diphenylguanidine":3},{"id":4,"title":5,"body":6,"category":169,"commonProducts":170,"description":174,"extension":175,"icon":176,"inciName":5,"irritantReason":177,"isCommonIrritant":178,"keyFacts":179,"localNames":189,"meta":190,"navigation":191,"path":192,"relatedArticles":193,"seo":197,"severity":198,"slug":199,"stem":200,"subtitle":201,"symptoms":202,"synonyms":207,"__hash__":210},"ingredients/learn/ingredients/diphenylguanidine.md","Diphenylguanidine",{"type":7,"value":8,"toc":159},"minimark",[9,14,21,28,32,35,48,55,58,62,89,92,96,99,110,114,117,120,123,127],[10,11,13],"h2",{"id":12},"what-is-diphenylguanidine","What is Diphenylguanidine?",[15,16,17,20],"p",{},[18,19,5],"strong",{}," (INCI: Diphenylguanidine; abbreviation: DPG; chemical name: 1,3-Diphenylguanidine) is a guanidine-based rubber vulcanization accelerator used in the manufacture of rubber articles including shoe components (outsoles, insoles, rubber upper portions), sports equipment, and rubber gloves. It is one of several rubber accelerator chemicals that facilitate the cross-linking of rubber polymers during the vulcanization process, converting raw rubber into durable, elastic finished materials.",[15,22,23,24,27],{},"DPG belongs to a different chemical class than the thiurams and carbamates but serves a similar manufacturing function. It has been increasingly recognized in recent years as a significant cause of ",[18,25,26],{},"shoe contact dermatitis"," — a condition where chemicals from shoe materials leach through to contact skin on the foot, causing allergic reactions. Its identification as a significant shoe allergen has been highlighted in contact dermatitis research from multiple countries.",[10,29,31],{"id":30},"why-does-diphenylguanidine-cause-reactions","Why does Diphenylguanidine cause reactions?",[15,33,34],{},"DPG sensitizes through Type IV delayed hypersensitivity following skin contact with rubber articles. In shoe contact dermatitis, the mechanism is:",[36,37,38,42,45],"ol",{},[39,40,41],"li",{},"Sweat production and heat in closed footwear increases DPG leaching from rubber components",[39,43,44],{},"The leached DPG contacts dorsal foot skin, toe web spaces, or plantar skin through the shoe lining and insole",[39,46,47],{},"In sensitized individuals, this triggers a delayed hypersensitivity reaction presenting 24–72 hours after exposure",[15,49,50,51,54],{},"The clinical pattern of ",[18,52,53],{},"bilateral symmetrical foot dermatitis"," — matching the contact pattern of the shoe — is characteristic of shoe contact dermatitis. This bilateral, symmetrical presentation helps differentiate shoe contact dermatitis from tinea pedis (athlete's foot), which is typically asymmetrical.",[15,56,57],{},"DPG allergy has been increasingly detected in sports medicine and dermatology contexts as athletic footwear use increases. Sports shoes (sneakers, running shoes) are particularly high-risk because they are worn for extended periods with significant foot sweating.",[10,59,61],{"id":60},"where-is-diphenylguanidine-found-in-products","Where is Diphenylguanidine found in products?",[63,64,65,71,77,83],"ul",{},[39,66,67,70],{},[18,68,69],{},"Athletic and sports footwear",": Running shoes, basketball shoes, sports trainers with significant rubber components",[39,72,73,76],{},[18,74,75],{},"Rubber-soled casual footwear",": Many everyday shoes with synthetic or natural rubber outsoles",[39,78,79,82],{},[18,80,81],{},"Rubber gloves",": Some industrial and household rubber gloves",[39,84,85,88],{},[18,86,87],{},"Sports equipment",": Bicycle grips, racket handles, protective gear with rubber padding",[15,90,91],{},"DPG is a manufacturing chemical, not a cosmetic ingredient, and is not declared on consumer product labels.",[10,93,95],{"id":94},"how-to-identify-dpg-exposure","How to identify DPG exposure",[15,97,98],{},"Because DPG is not labeled on consumer products, identifying exposure requires:",[63,100,101,104,107],{},[39,102,103],{},"Correlation of rash pattern with shoe coverage (bilateral, symmetrical foot dermatitis)",[39,105,106],{},"Patch testing at a contact dermatitis clinic using shoe component materials (rubber, insole samples) or the standard DPG test concentration",[39,108,109],{},"History of reaction improvement when switching to sandals or non-rubber footwear",[10,111,113],{"id":112},"in-indian-products","In Indian products 🇮🇳",[15,115,116],{},"India is one of the world's largest markets for rubber footwear — from inexpensive rubber chappals to athletic shoes. The widespread use of rubber-soled footwear across all demographics, combined with hot and humid conditions that increase foot sweating and chemical leaching, makes DPG shoe dermatitis a potentially significant but underdiagnosed problem in India.",[15,118,119],{},"Indian patients presenting with bilateral foot dermatitis, particularly involving the dorsum of the foot and toe areas, should be questioned about footwear and considered for shoe material patch testing. Indian-manufactured rubber footwear (Bata, Liberty, local brands) as well as imported athletic shoes may all contain DPG.",[15,121,122],{},"The relatively high prevalence of rubber chappals (slippers) and closed athletic footwear in India makes this allergen clinically relevant for Indian dermatologists managing foot dermatitis.",[10,124,126],{"id":125},"safer-alternatives","Safer alternatives",[63,128,129,135,141,147,153],{},[39,130,131,134],{},[18,132,133],{},"Leather-soled footwear",": Natural leather soles with minimal rubber content reduce DPG exposure",[39,136,137,140],{},[18,138,139],{},"Open sandals",": Reduce shoe-to-skin contact and chemical leaching",[39,142,143,146],{},[18,144,145],{},"DPG-free athletic footwear",": Some specialized shoe manufacturers offer rubber accelerator-free options; contact manufacturers for material safety information",[39,148,149,152],{},[18,150,151],{},"Interposing sock layer",": Wearing moisture-wicking cotton socks creates a barrier between shoe rubber and skin",[39,154,155,158],{},[18,156,157],{},"Nitrile gloves for hand protection",": Avoids rubber accelerator exposure from rubber household gloves",{"title":160,"searchDepth":161,"depth":161,"links":162},"",2,[163,164,165,166,167,168],{"id":12,"depth":161,"text":13},{"id":30,"depth":161,"text":31},{"id":60,"depth":161,"text":61},{"id":94,"depth":161,"text":95},{"id":112,"depth":161,"text":113},{"id":125,"depth":161,"text":126},"rubber_accelerator",[171,87,172,173],"Rubber shoes","Gloves","Athletic footwear","A rubber vulcanization accelerator found in shoes, gloves, and sports equipment. A significant cause of shoe-related contact dermatitis that can leach through insoles and uppers to contact the foot and hand skin.","md","🧤",null,false,[180,183,186],{"label":181,"value":182},"Shoe dermatitis","DPG is one of the leading causes of shoe contact dermatitis — presents as bilateral symmetric foot dermatitis matching shoe coverage",{"label":184,"value":185},"Leaching mechanism","DPG leaches from rubber shoe components (insoles, outsoles, shoe lining) with sweat and heat, particularly in closed athletic footwear",{"label":187,"value":188},"ACDS listing","ACDS-listed rubber accelerator; included in shoe material patch test panels used by specialized contact dermatitis centers",[],{},true,"/learn/ingredients/diphenylguanidine",[194],{"slug":195,"title":196},"/learn/patch-test-results-now-what","Patch Test Results: Now What?",{"title":5,"description":174},"moderate","diphenylguanidine","learn/ingredients/diphenylguanidine","A rubber accelerator in shoes and sports equipment — a common cause of shoe contact dermatitis",[203,204,205,206],"Shoe contact dermatitis (foot dorsum, toes, plantar surface)","Hand dermatitis from rubber-handled sports equipment","Bilateral symmetrical foot rash","Dermatitis corresponding to shoe coverage pattern",[208,209],"DPG","1,3-Diphenylguanidine","ej1-6ALrN4-jSeDaQQoFcH-r1iAupfp6QYzCHm-YuDo",1778416676453]