2-hydroxypropanoic acid
This is the primary chemical detail page for 2-hydroxypropanoic acid · CAS 50-21-5. The verified molecular formula is C3H6O3. 277 searchable synonyms resolve back to this record. Use this page as the main reference for identifiers, naming variants, and supplier-linked context.
Overview
Key identifiers
- CAS No.
- 50-21-5
- Primary name
- 2-hydroxypropanoic acid
- Formula
- C3H6O3
Record status
Added Apr 3, 2026 · Updated Apr 3, 2026
Properties
- Molecular formula
- C3H6O3
Safety
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About this chemical
This page represents the primary record for 2-hydroxypropanoic acid with CAS Registry Number 50-21-5. The molecular formula is C3H6O3. This chemical may be referenced by 277 different names or synonyms.
Primary identifiers: English name · CAS · Molecular formula (when available). Synonym and alternate-name pages all resolve back to this record.
Synonyms and naming
Chemicals are often known by multiple names depending on context, industry, or language. This entry includes 277 searchable synonyms. Alternate-name landing pages, where present, all resolve back to this main record.
Use the synonym list below as naming context; keep this chemical detail page as the primary reference.
Formula status
The molecular formula C3H6O3 for this substance is verified. This identifier has been confirmed to accurately represent the chemical composition.
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Synonyms
Common & readable names (261)
- lactic acid
- DL-Lactic acid
- 50-21-5
- 2-hydroxypropionic acid
- Milk acid
- Tonsillosan
- Racemic lactic acid
- Ordinary lactic acid
- Acidum lacticum
- Ethylidenelactic acid
- Lactovagan
- Milchsaeure
- Lactic acid, dl-
- Kyselina mlecna
- Lacticum acidum
- Propanoic acid, 2-hydroxy-
- alpha-Hydroxypropionic acid
- Lactic acid USP
- 598-82-3
- Aethylidenmilchsaeure
- (RS)-2-Hydroxypropionsaeure
- FEMA No. 2611
- Milchsaure
- Lurex
- Propionic acid, 2-hydroxy-
- SY-83
- Purac FCC 80
- Purac FCC 88
- (+-)-2-Hydroxypropanoic acid
- Cheongin Haewoohwan
- Cheongin Haejanghwan
- alpha-Hydroxypropanoic acid
- AI3-03130
- HIPURE 88
- Lactic acid,buffered
- INS NO.270
- INS-270
- 3B8D35Y7S4
- E 270
- DTXCID003192
- E-270
- CHEBI:78320
- 2 Hydroxypropanoic Acid
- E270
- Synoshield
- Dermaplex
- ExfoliatingGel
- Synofilm
- LacticPlus
- Chloroxide A
- (2RS)-2-Hydroxypropanoic acid
- Encore Pre/Post
- Lactic acid, dl
- Soft-San
- CD2 Activator
- D Lactic Acid
- Lactate, Ammonium
- Pro-San Activator
- Cheongin Samrakhwan
- Aura Teat Scrubber
- Dermaplex Pre-Post
- Cover All Part A
- Cover II Part A
- CD2-FB Activator
- CD2-HD Activator
- CD2-LV Activator
- Soft Chlor Part A
- Xtra BLU Part A
- Atlas Prep Activator
- Aztec Gold Activator
- Opti-Guard Activator
- Lactic Acid Pre Dip
- Non-Iodine Teat Dip
- Fresh Morning Bifidus
- Orbit Clean Activator
- Ultra-Guard Activator
- Valiant Express Prime
- Lactic Acid Teat Dip
- GEA Velocity Part A
- Prep 8X RTU
- Pro-San LV Activator
- Dermaplex PrePost JPN
- Integrity Blue Part A
- Uddercare Plus Part A
- Atlas Barrier Activator
- Cover All RF Part A
- RefChem:6451
- 2 Hydroxypropionic Acid
- Atlas PrePost Activator
- Chlorsan 105 Part A
- Lactic acid, unspecified
- Sodium Chlorite Teat Dip
- Uddercare Barrier Part A
- XT Barrier BLU Part A
- EpiStar Barrier Activator
- Ultra-Guard HV Activator
- CD2-X11-LD Activator
- PREP 8X4 CONC
- XT-1 Pre-Post Part A
- XTRA 7 PART A
- ChloraGuard 105 Part A
- Gladiator Barrier Activator
- Udderstar Barrier Activator
- EpiStar Pre-Post Activator
- Gladiator PostMax Activator
- Gladiator PrepMax Activator
- Integrity Pre-Post Part A
- Soft Chlor Barrier Part A
- XTRA GUARD (Part A)
- PREP 8X8
- Pro-San LV Plus Activator
- UdderStar PrePost Activator
- XTRA BLU Conc. Part A
- Gladiator Pre-Post Activator
- Non-Iodine Barrier Teat Dip
- Fresh Morning Bifidus Bifidus
- 05%/5% Elite Barrier Dip
- DiOxi Star Pre-Post Activator
- Gladiator BLU Winter Activator
- 33X04XA5AT
- Gladiator BLU Barrier Activator
- CD-10 A Concentrated Activator
- Gladiator BLU Pre-Post Activator
- Udderstar Gold Pre-Post Activator
- iShanCare Vaginal Antibacterial Gel
- X12 Pre-Post Activator Concentrate
- LACTIC Acid 35 Skin Chemical Peel
- LACTIC Acid 50 Skin Chemical Peel
- LACTIC Acid 70 Skin Chemical Peel
- LACTIC Acid 90 Skin Chemical Peel
- Chlorsan 105 Barrier Teat Dip Part A
- Chlorsan Teat Scrubber Concentrate Part A
- Chlorine Dioxide Pre-Post Milking Teat Dip
- GEA Bi-Sept Activator Pre-Post Milking Non-Iodine Teat Dip
- 200-018-0
- 209-954-4
- 825-250-5
- CHEBI:28358
- hydron;2-hydroxypropanoate
- DL-Milchsaeure
- (+/-)-Lactic acid
- 1-Hydroxyethanecarboxylic acid
- DL- lactic acid
- Kyselina 2-hydroxypropanova
- 2-Hydroxypropionicacid
- CCRIS 2951
- HSDB 800
- Lactic acid, tech grade
- .alpha.-Hydroxypropanoic acid
- .alpha.-Hydroxypropionic acid
- (+/-)-2-hydroxypropanoic acid
- NCGC00090972-01
- 2-hydroxy-propionic acid
- Lactic acid (natural)
- DL-Lactic Acid (90%)
- Milchsaure [German]
- Lactic acid [JAN]
- Biolac
- FEMA Number 2611
- Kyselina mlecna [Czech]
- Propanoic acid, hydroxy-
- 163894-00-6
- Chem-Cast
- Cheongin samrakhan
- CAS-50-21-5
- (R)-2-Hydroxy-propionic acid;H-D-Lac-OH
- Kyselina 2-hydroxypropanova [Czech]
- EINECS 200-018-0
- EINECS 209-954-4
- Lactic acid [USP:JAN]
- EPA Pesticide Chemical Code 128929
- BRN 5238667
- lactasol
- 1-Hydroxyethane 1-carboxylic acid
- 2-Hydroxy-2-methylacetic acid
- L-isomer
- Lactate (Standard)
- 4b5w
- Propanoic acid, (+-)
- DL-Lactic Acid, Racemic
- SCHEMBL999
- (.+/-.)-Lactic acid
- EC 200-018-0
- Lactic acid (7CI,8CI)
- Lactic acid (JP18/USP)
- Lactic acid, 85%, FCC
- Lactic Acid, Racemic, USP
- NCIOpen2_000884
- LACTIC ACID (+-)
- SCHEMBL97281
- DL-LACTIC ACID [MI]
- LACTIC ACID [WHO-IP]
- SCHEMBL910471
- (RS)-2-hydroxypropanoic acid
- LACTICUM ACIDUM [HPUS]
- orb1680007
- orb3025421
- SCHEMBL1670367
- SCHEMBL2945151
- DL-Lactic Acid (90per cent)
- CHEMBL1200559
- Lactic acid, natural, >=85%
- PROPANOIC ACID, 2-HYDROXY-, (2S)-, HOMOPOLYMER
- SCHEMBL15902696
- BDBM23233
- HY-B2227R
- L-lactic acid or dl-lactic acid
- Lactic Acid, 85 Percent, FCC
- LACTIC ACID, DL- [II]
- DL-Lactic acid, ~90% (T)
- DL-Lactic acid, AR, >=88%
- DL-Lactic acid, LR, >=88%
- HMS5085M12
- Lactic Acid (mixture of polymers)
- DL- LACTIC ACID [WHO-DD]
- Lactic Acid, 10 Percent Solution
- HY-B2227
- Propanoic acid, 2-hydroxy- (9CI)
- Tox21_111049
- Tox21_202455
- Tox21_303616
- BBL027466
- EBC-04352
- STL282744
- AKOS000118855
- AKOS017278364
- MSK4413-1000W
- Tox21_111049_1
- ACIDUM LACTICUM [WHO-IP LATIN]
- DB04398
- FL14256
- Propanoic acid,2-hydroxy-,(.+/-.)-
- 2-Hydroxypropionic acid, DL-Lactic acid
- NCGC00090972-02
- NCGC00090972-03
- NCGC00257515-01
- NCGC00260004-01
- 849585-22-4
- Lactic Acid, 85 Percent, Reagent, ACS
- (R)-Lactate;(R)-2-Hydroxypropionic acid;
- DB-071134
- DB-347146
- Lactic acid Solution in Water, 1000ug/mL
- CS-0021601
- L0226
- Polylactic acid - MW 40,000~80,000
- EN300-19542
- Lactic acid, meets USP testing specifications
- D00111
- DL-Lactic acid, SAJ first grade, 85.0-92.0%
- Q161249
- 2-Hydroxypropionic acid, Natural, Kosher Certified
- DL-Lactic acid, JIS special grade, 85.0-92.0%
- Dl-alpha-hydroxypropionic acid;2-hydroxypropionic acid
- F2191-0200
- Z104474158
- BC10F553-5D5D-4388-BB74-378ED4E24908
- Lactic acid, United States Pharmacopeia (USP) Reference Standard
- Lactic acid, Pharmaceutical Secondary Standard; Certified Reference Material
- DL-Lactic acid 90%, synthetic, meets the analytical specifications of Ph. Eur.
- 152-36-3
Registry & reference names (16)
- NSC-367919
- DTXSID7023192
- DTXSID901015667
- NSC 367919
- MFCD00004520
- C01432
- UNII-3B8D35Y7S4
- NSC367919
- SBB065762
- SB44647
- SB44652
- FP158009
- F71201
- H57994
- F995229
- F996693
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