Compound
L-cysteine hydrochloride
A hydrochloride obtained by combining L-cysteine with one molar equivalent of hydrogen chloride.
Definition from ChEBI (CHEBI:91247), read 2026-09-23. CC BY 4.0.
CHEBI:91247ChEBI
Structure
- Formula
- C3H7NO2S.HCl
- Mass
- 157.622 g/mol
- Charge
- 0
- InChIKey
- IFQSXNOEEPCSLW-DKWTVANSSA-N
- SMILES
- Cl.N[C@@H](CS)C(=O)O
- Look it up
- ChEBIBy InChIKey
Identity from ChEBI. Not evidence.
What it touches on the way
Mechanistic reach
1 entity
1 entities reached.
0 reported hops1 assembled from the scaffold
- L-cysteineCompoundCHEBI:17561converted toInferred only6 paths6 endpoints
What the reference databases state
Statements
2 statements
2 statements · 1 reference database · Subject: L-cysteine hydrochloride · Sources: ChEBI
- L-cysteine hydrochloride is converted to L-cysteineCompoundChEBI CHEBI:91247Inferred only
- L-cysteine hydrochloride hydrate is converted to L-cysteine hydrochlorideCompoundChEBI CHEBI:91248Inferred only
On the label
Labelled products
110 products
Source: NIH DSLD · Ingredient: L-cysteine hydrochloride · 110 products · Declared amount per serving: 0.6–1,500 mg (110 products)
110 labels state an amount0 do not
- 1MD NutritionLiverMD400 mgper 2 Capsule(s)DSLD:309821
- 21st CenturyMega Multi for Men50 mgper 2 Tablet(s)DSLD:258471
- AB American BiologicsUltra Inf-Zyme Forte10 mgper 1 Tablet(s)DSLD:203886
- AB American BiologicsUltra Inf-Zyme Forte10 mgper 1 Tablet(s)DSLD:203887
- Allergy Research GroupAntiOx Original75 mgper 1 Capsule(s)DSLD:233057
- Allergy Research GroupAntiOx Original75 mgper 1 Capsule(s)DSLD:233058
- Anabolic WarfareProject Liver Support150 mgper 2 Capsule(s)DSLD:307037
- Best NaturalsL-Cysteine 500 mg500 mgper 1 Capsule(s)DSLD:269808
- BIOVEAHair, Skin & Nails50 mgper 2 Vegetarian Capsule(s)DSLD:277880
- BluebonnetL-Cysteine 500 mgL-Cysteine HCl Note: free-form500 mgper 1 Capsule(s)DSLD:176392
- BluebonnetL-Cysteine 500 mgL-Cysteine HCl Note: free-form500 mgper 1 Capsule(s)DSLD:176394
- BluebonnetL-Cysteine 500 mg500 mgper 1 Capsule(s)DSLD:314805
Show the remaining 98
- BluebonnetUltimate Hair & Nail Formula100 mgper 3 Capsule(s)DSLD:179115
- BluebonnetUltimate Hair & Nail Formula100 mgper 3 Capsule(s)DSLD:179124
- BluebonnetUltimate Hair & Nail Formula100 mgper 3 Capsule(s)DSLD:280187
- BluebonnetUltimate Hair & Nail Formula100 mgper 3 Capsule(s)DSLD:284569
- Bronson LaboratoriesNutritional Packets For Men Yellow Oval TabletL-Cysteine (Form: as L-Cysteine HCl)40 mgper 2 Tablet(s)DSLD:25080
- BulkSupplements.comL-Cysteine HCl500 mgper 500 mgDSLD:312130
- BulkSupplements.comL-Cysteine HCl500 mgper 500 mgDSLD:312131
- BulkSupplements.comL-Cysteine HCl500 mgper 500 mgDSLD:312132
- BulkSupplements.comL-Cysteine HCl500 mgper 500 mgDSLD:312133
- CHK NutritionCysReplete1,500 mgper 2 Capsule(s)DSLD:174186
- CHK NutritionCysReplete1,500 mgper 2 Capsule(s)DSLD:252949
- Country LifeMax-Amino Caps with Vitamin B6L-Cysteine (Form: as L-Cysteine Hydrochloride)30 mgper 4 Capsule(s)DSLD:208012
- Country LifeMax-Amino Caps with Vitamin B6L-Cysteine (Form: as L-Cysteine Hydrochloride)30 mgper 4 Capsule(s)DSLD:208016
- Country LifeMaxi-Hair Plus 5,000 mcg BiotinL-Cysteine (Form: as L-Cysteine Hydrochloride)100 mgper 4 Capsule(s)DSLD:75874
- DCVision GardL-Cysteine (Form: as L-Cysteine Hydrochloride)30 mgper 1 Capsule(s)DSLD:266022
- Doctors' PreferredVision Essentials Gold260 mgper 4 Capsule(s)DSLD:309896
- Douglas LaboratoriesAdded Protection III (Without Copper And Iron)250 mgper 6 Tablet(s)DSLD:62906
- Douglas LaboratoriesSplit Dose Ultra Evening Meal P.M.50 mgper 2 Tablet(s)DSLD:8780
- Douglas LaboratoriesSplit Dose Ultra Morning Meal AML-Cysteine (Form: from L-Cysteine HCl)50 mgper 2 Tablet(s)DSLD:8776
- Douglas LaboratoriesUltra Catabolic75 mgper 1 Capsule(s)DSLD:8366
- Dr. Venessa's FormulasLivercleanL-Cysteine (Form: as L-Cysteine HCl)300 mgper 3 Tablet(s)DSLD:45218
- Ecological FormulasFree Radical Quenchers60 mgper 1 Capsule(s)DSLD:299771
- elonR3 Extra Strength50 mgper 2 Tablet(s)DSLD:293479
- ElonMatrix 500050 mgper 1 Tablet(s)DSLD:319976
- Endo-met LaboratoriesEndo-PanL-Cysteine (Form: from L-Cysteine HCl)50 mgper 1 Tablet(s)DSLD:229099
- Endo-met LaboratoriesEndo-PanL-Cysteine (Form: from L-Cysteine HCl)50 mgper 1 Tablet(s)DSLD:255990
- EnergetixMetabolic MatrixL-Cysteine (Form: as {L-Cysteine} Hydrochloride)500 mgper 33.4 gDSLD:22833
- FuturebioticsHair, Skin & Nails150 mgper 3 Tablet(s)DSLD:298877
- FuturebioticsHair, Skin & Nails150 mgper 3 Tablet(s)DSLD:320002
- Genestra BrandsCDC ForteL-Cysteine (Form: as L-Cysteine Hydrochloride)9.8 mgper 1 Tablet(s)DSLD:228720
- Genestra BrandsSuper Oxi FormulaL-Cysteine (Form: as L-Cysteine Hydrochloride)5 mgper 1 Capsule(s)DSLD:202842
- Genestra BrandsSuper Oxi Formula5 mgper 1 Capsule(s)DSLD:56166
- Health PlusSuper Joint Cleanse51 mgper 4 Capsule(s)DSLD:47110
- Health Products DistributorsHepa Plus100 mgper 1 Capsule(s)DSLD:321333
- Health Thru Nutrition NaturallyPhysician's MultiVitamin Formula10 mgper 1 Caplet(s)DSLD:177596
- Integrative TherapeuticsGlutathione Cell Defense80 mgper 1 Capsule(s)DSLD:322145
- Life ExtensionGlutathione, Cysteine & C200 mgper 1 Capsule(s)DSLD:328468
- Life PriorityOne Per Meal Lifeguard33 mgper 1 Capsule(s)DSLD:320760
- Martin Avenue PharmacyAntiOxidant Essentials With Vitamins C & E100 mgper 2 Tablet(s)DSLD:18770
- Meijer NaturalsSuper Antioxidant Formula100 mgper 2 Tablet(s)DSLD:9303
- Metabolic MaintenanceBasic ScavengersL-Cysteine (Form: as L-Cysteine HCl)200 mgper 3 Capsule(s)DSLD:24736
- MetagenicsUltraClear Plus pH Pineapple Banana FlavorL-Cysteine (Form: as L-Cysteine HCl)85 mgper 11.5 Gram(s)DSLD:216620
- MetagenicsUltraClear Plus pineapple banana flavorL-Cysteine (Form: as L-Cysteine HCl)85 mgper 42 Gram(s)DSLD:210111
- MetagenicsUltraClear Vanilla FlavorL-Cysteine (Form: as L-Cysteine HCl)30 mgper 42 Gram(s)DSLD:210119
- NatrolSkin Hair Nails75 mgper 2 Capsule(s)DSLD:55933
- NatrolSkin, Hair & Nails25 mgper 1 Capsule(s)DSLD:306535
- Natural ClinicianClinical Chelation Companion100 mgper 2 Capsule(s)DSLD:18605
- Nature's HarmonyHigh Potency One-Per-Day Timed-Release Multi-Vitamins & Minerals0.6 mgper 1 Tablet(s)DSLD:21932
- Nature's SunshineMega Chel250 mgper 4 Tablet(s)DSLD:255362
- Nature's WayCell Formula100 mgper 2 Tablet(s)DSLD:213472
- Nature's WayCell Formula100 mgper 2 Tablet(s)DSLD:293266
- NOWL-Cysteine 500 mgL-Cysteine (Form: from L-Cysteine Hydrochloride)500 mgper 1 Tablet(s)DSLD:210355
- NutraBio100% Pure L-Cysteine1,000 mgper 1 Gram(s)DSLD:51129
- NutraBio100% Pure L-Cysteine1,000 mgper 1 Gram(s)DSLD:51130
- Nutri-WestL-Cysteine-SL-Cysteine HCL Note: Pure Crystalline Free Form Amino Acid500 mgper 1 Tablet(s)DSLD:28009
- NutriCologyAntiOx Original75 mgper 1 Capsule(s)DSLD:234794
- NutriCologyAntiOx Original75 mgper 1 Capsule(s)DSLD:234795
- NutriliteHair, Skin, & Nail Health30 mgper 1 Tablet(s)DSLD:328164
- NutriliteHair, Skin, & Nail Health30 mgper 1 Tablet(s)DSLD:328235
- Parrillo PerformanceUltimate Amino Formula40 mgper 2 Capsule(s)DSLD:322532
- Premium CertifiedJointsyl9.8 mgper 3 Tablet(s)DSLD:248669
- Puritan's Pride PremiumWomen's Exclusive Formula Daily MultiL-Cysteine (Form: as L-Cysteine Hydrochloride)50 mgper 2 Caplet(s)DSLD:26668
- RadianceMaximum Anti-Oxidant Formula50 mgper 2 Tablet(s)DSLD:3059
- Radiance SelectMen's MultipleL-Cysteine (Form: as L-Cysteine Hydrochloride)50 mgper 2 Tablet(s)DSLD:2893
- Return HealthyGlutathione Symmetry200 mgper 2 Capsule(s)DSLD:313313
- SolgarAdvanced Antioxidant Formula100 mgper 2 Vegetable Capsule(s)DSLD:218029
- SolgarAntioxidant FactorsL-Cysteine (Form: as L-Cysteine HCl)100 mgper 1 Tablet(s)DSLD:213742
- SolgarAntioxidant FactorsL-Cysteine (Form: as L-Cysteine HCl)100 mgper 1 Tablet(s)DSLD:217323
- SolgarAntioxidant FactorsL-Cysteine (Form: as L-Cysteine HCl)100 mgper 1 Tablet(s)DSLD:217332
- SolgarL-Cysteine 500 mgL-Cysteine (Form: as L-Cysteine HCl) Note: free form500 mgper 1 Vegetable Capsule(s)DSLD:201101
- SolgarL-Cysteine 500 mgL-Cysteine (Form: as L-Cysteine HCl) Note: free form500 mgper 1 Vegetable Capsule(s)DSLD:217644
- Source NaturalsHangover Formula100 mgper 3 Tablet(s)DSLD:72841
- Source NaturalsVegan True Vegan Force Multiple100 mgper 2 Tablet(s)DSLD:79153
- Source NaturalsWellness D-mmunity 125 MCG50 mgper 2 Capsule(s)DSLD:296374
- Source NaturalsWellness D-mmunity 125 MCG50 mgper 2 Capsule(s)DSLD:296376
- SuperSmartAlcohol Detox125 mgper 1 Capsule(s)DSLD:332598
- Terry NaturallyHealthy Blood FlowL-Cysteine (Form: as Cysteine HCl)200 mgper 4 Capsule(s)DSLD:39682
- The Beard ClubGrowth Vitamins Vanilla Flavored25 mgper 2 Vegetarian Capsule(s)DSLD:269498
- The Vitamin ShoppeEspecially for Men50 mgper 2 Tablet(s)DSLD:213753
- The Vitamin ShoppeEspecially For Men50 mgper 2 Tablet(s)DSLD:213789
- The Vitamin ShoppeHair, Skin and NailsL-Cysteine (Form: as L-Cysteine HCl)150 mgper 3 Tablet(s)DSLD:217793
- The Vitamin ShoppeHair, Skin and NailsL-Cysteine (Form: as L-Cysteine HCl)150 mgper 3 Tablet(s)DSLD:217808
- The Vitamin ShoppeOne Daily with Lutein & Lycopene5 mgper 1 Tablet(s)DSLD:27013
- tnvitaminsRadical Raiders50 mgper 2 Tablet(s)DSLD:217859
- USANABody Rox15 mgper 1 Tablet(s)DSLD:322308
- VitabaseSuper Antioxidant Formula100 mgper 2 Tablet(s)DSLD:6944
- VitacostSpecial for Men MultivitaminL-Cysteine (Form: as L-Cysteine HCl)50 mgper 2 Tablet(s)DSLD:240075
- Vitamin WorldMaximum Antioxidant50 mgper 2 Caplet(s)DSLD:21130
- Vitamin WorldUltra Man Hair FormulaL-Cysteine (Form: as L-Cysteine Hydrochloride)334 mgper 3 Caplet(s)DSLD:1854
- Vitamin WorldUltra Man Max Daily MultiL-Cysteine (Form: as L-Cysteine Hydrochloride)50 mgper 2 Caplet(s)DSLD:21154
- Vitamin WorldUltra Man Max Daily MultiL-Cysteine (Form: as L-Cysteine Hydrochloride)50 mgper 2 Caplet(s)DSLD:21270
- Vitamin WorldUltra Man Max Daily MultiL-Cysteine (Form: as L-Cysteine Hydrochloride)50 mgper 2 Caplet(s)DSLD:240125
- Vitamin WorldUltra Vita Man 50+50 mgper 2 Tablet(s)DSLD:3275
- Whitaker NutritionVision Essentials Gold260 mgper 4 Capsule(s)DSLD:273829
- Whitaker NutritionVision Essentials GOLD260 mgper 4 Capsule(s)DSLD:267552
- Williams NutritionEssential Vitamins, Minerals & Antioxidants25 mgper 4 Capsule(s)DSLD:287812
- Williams NutritionVision Advantage250 mgper 3 Capsule(s)DSLD:323061
- YoungevityUltimate DailyL-Cysteine (Form: from L-Cysteine HCl)100 mgper 2 Tablet(s)DSLD:81796
Label record: NIH Office of Dietary Supplements · CC0
Other names
8 names
Resolves to: L-cysteine hydrochloride
- Also called
- (R)-Cysteine hydrochlorideCysteine HCl (anhydrous)Cysteine hydrochloride (anhydrous)Cysteine monohydrochlorideL-(+)-Cysteine hydrochlorideL-Cysteine monohydrochlorideL-cysteinium chloride
- Systematic name
- (1R)-1-carboxy-2-sulfanylethan-1-aminium chloride