Product Name

  • Name

    Histidine

  • EINECS 200-745-3
  • CAS No. 71-00-1
  • Article Data194
  • CAS DataBase
  • Density 1.423 g/cm3
  • Solubility 41.6 g/L (25 ºC)
  • Melting Point 282 °C (dec.)(lit.)
  • Formula C6H9N3O2
  • Boiling Point 458.9 °C at 760 mmHg
  • Molecular Weight 155.156
  • Flash Point 231.3 °C
  • Transport Information
  • Appearance white crystalline powder
  • Safety 24/25-36/37-26-22
  • Risk Codes 22-36/37/38
  • Molecular Structure Molecular Structure of 71-00-1 (Histidine)
  • Hazard Symbols HarmfulXn
  • Synonyms (S)-alpha-amino-1H-Imidazole-4-propanoic acid;Histidinum [INN-Latin];alpha-Amino-4(or 5)-imidazolepropionic acid;(L)-Histidine;1H-Imidazole-4-alanine, (S)-;4-(2-Amino-2-carboxyethyl)imidazole;(S)-4-(2-Amino-2-carboxyethyl)imidazole;(2S)-2-azaniumyl-3-(3H-imidazol-4-yl)propanoate;Histidine (VAN);L-Alanine, 3-(1H-imidazol-4-yl)-;Glyoxaline-5-alanine;S-Histidine;alpha-amino-4-imidazoleproprionic acid;Histidine (USP);Istidina;L-Histidine (JAN);(S)-2-Amino-3-(4-imidazolyl)propionsaeure;L-Histidine Base;L-2-Amino-3-(4-imidazolyl)propionic acid;L-His-OH;L-Histidine;HIS;(S)-alpha-Amino-1H-imidazole-4-propionic acid;
  • PSA 92.00000
  • LogP 0.06440

Synthetic route

N(α)-t-butoxycarbonyl-N(ϖ)-benzyloxymethyl-L-histidine
83468-83-1

N(α)-t-butoxycarbonyl-N(ϖ)-benzyloxymethyl-L-histidine

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With Nafion H; dimethylsulfide; 3-methyl-phenol; trifluoroacetic acid for 3h;100%
With trimethylsilyl trifluoromethanesulfonate; diphenyl sulfide In trifluoroacetic acid at 0℃; for 0.5h; Product distribution; New peptide deprotection procedure: hard-soft acid-base concept; the role of soft bases (thioanisole, dimethylsulfide, diphenylsulfide) employed.;90.2%
Boc-His(Tos)-OH
35899-43-5

Boc-His(Tos)-OH

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With trimethylsilyl trifluoromethanesulfonate; diphenyl sulfide In trifluoroacetic acid at 0℃; for 0.5h; Product distribution; New peptide deprotection procedure: hard-soft acid-base concept; the role of soft bases (thioanisole, dimethylsulfide, diphenylsulfide) employed.;100%
With trifluoroacetic acid-thioanisole for 1h; Product distribution; various reagents;16.7%
H-His(MBS)-OH
73475-63-5

H-His(MBS)-OH

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With sodium hydroxide at 23℃; for 1h; Product distribution; various reagents;100%
hexan-1-amine
111-26-2

hexan-1-amine

(S)-2-(3,5-Dinitro-4-oxo-4H-pyridin-1-yl)-3-(1H-imidazol-4-yl)-propionic acid
78641-69-7

(S)-2-(3,5-Dinitro-4-oxo-4H-pyridin-1-yl)-3-(1H-imidazol-4-yl)-propionic acid

A

1-hexyl-3,5-dinitro-4-pyridone
74197-48-1

1-hexyl-3,5-dinitro-4-pyridone

B

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
In pyridine Product distribution;A n/a
B 92%
N-(tert-butoxycarbonyl)-L-histidine
17791-52-5

N-(tert-butoxycarbonyl)-L-histidine

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With tetradecyl(trihexyl)phosphonium bistriflamide; trifluoroacetic acid at 130℃; for 0.166667h; Ionic liquid;92%
C6H9N3O2*H3N*ClH

C6H9N3O2*H3N*ClH

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With ruthenium nanoparticles dispersed in a polyvinylpyrrolidone matrix; amberlyst A-21 In methanol; dichloromethane87%
(2S)-2-amino-3-(2-mercapto-1H-imidazol-4-yl)propanoic acid
2002-22-4

(2S)-2-amino-3-(2-mercapto-1H-imidazol-4-yl)propanoic acid

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With iron(III) sulfate In water at 95℃; for 1h;85%
C19H17N3O2

C19H17N3O2

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With palladium In methanol; cyclohexane for 120h; Reflux;84.5%
Carnosine
305-84-0

Carnosine

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With trans-[Co(3,2,3-tet)Cl2]Cl; water In water at 45℃; for 6h; pH=7.5;75%
D-glucose
50-99-7

D-glucose

A

L-alanin
56-41-7

L-alanin

B

glycine
56-40-6

glycine

C

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With ammonium sulfate; ammonium hydroxide; dipotassium hydrogenphosphate; potassium dihydrogenphosphate; (S)-2-[3]pyridyl-pyrrolidine-1-carboxylic acid amide; calcium (R)-pantothenate; Thiamine hydrochloride; magnesium sulfate; iron(II) sulfate; urea; calcium carbonate; sodium chloride; manganese(ll) chloride; biotin In water at 28℃; for 46h; Mechanism; fermentation with Corynebacterium glutamicum N-730; pH=7.4;A n/a
B n/a
C 5%

A

L-histidine
71-00-1

L-histidine

B

D-histidin
351-50-8

D-histidin

Conditions
ConditionsYield
durch fraktionierte Krystallisation des d-weinsaeuren Salzes; das Salz des d-Histidins krystallisiert zuerst aus;
N-acetylhistidine
10101-30-1

N-acetylhistidine

A

L-histidine
71-00-1

L-histidine

B

Nα-acetyl-D-histidine
75983-68-5

Nα-acetyl-D-histidine

Conditions
ConditionsYield
With enzymesubstance from pig's kidney
His-Ala-Asp-Gly
101301-56-8

His-Ala-Asp-Gly

A

L-alanin
56-41-7

L-alanin

B

L-Aspartic acid
56-84-8

L-Aspartic acid

C

glycine
56-40-6

glycine

D

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With Tris-HCl buffer In water at 37℃; Product distribution;
His-Ser-Asn-Gly
101301-51-3

His-Ser-Asn-Gly

A

L-serin
56-45-1

L-serin

B

L-asparagine
70-47-3

L-asparagine

C

glycine
56-40-6

glycine

D

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With Tris-HCl buffer In water at 37℃; Product distribution;
His-Ser-Glu-Gly
101301-54-6

His-Ser-Glu-Gly

A

L-serin
56-45-1

L-serin

B

L-glutamic acid
56-86-0

L-glutamic acid

C

glycine
56-40-6

glycine

D

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With Tris-HCl buffer In water at 37℃; Product distribution;
H-His-Ser-Asp-Ala-OH
86741-98-2

H-His-Ser-Asp-Ala-OH

A

L-alanin
56-41-7

L-alanin

B

L-serin
56-45-1

L-serin

C

L-Aspartic acid
56-84-8

L-Aspartic acid

D

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With acetic acid In water at 37℃; for 720h; Product distribution; further reagent, pH;
angiotensin I
484-42-4

angiotensin I

A

L-leucine
61-90-5

L-leucine

B

L-isoleucine
73-32-5

L-isoleucine

C

L-phenylalanine
63-91-2

L-phenylalanine

D

L-tyrosine
60-18-4

L-tyrosine

E

L-proline
147-85-3

L-proline

F

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With 155K Aspergillus oryzae ACID CPASE O at 30℃; for 1h; pH 3.7, release of C-terminal amino acid residues at longer incubation times;
Nα-(3-hydroxy-5-hydroxymethyl-2-methyl-pyridin-4-ylmethylene)-histidine
14029-59-5

Nα-(3-hydroxy-5-hydroxymethyl-2-methyl-pyridin-4-ylmethylene)-histidine

A

pyridoxal hydrochloride
65-22-5

pyridoxal hydrochloride

B

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With buffer solution In various solvent(s) at 25℃; Rate constant;
His-Ser-Asp-Gly
27510-94-7

His-Ser-Asp-Gly

A

L-serin
56-45-1

L-serin

B

L-Aspartic acid
56-84-8

L-Aspartic acid

C

glycine
56-40-6

glycine

D

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With Tris-HCl buffer In water at 37℃; Product distribution;
urocanic Acid
3465-72-3

urocanic Acid

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With Tris buffer; ammonium acetate In water at 25℃; for 6h; Equilibrium constant; pH 8.41;
D,L-histidine
71-00-1

D,L-histidine

A

L-histidine
71-00-1

L-histidine

B

D-histidin
351-50-8

D-histidin

cyclo(Gly-L-Leu-L-His-L-Phe-L-Ala-L-Phe-L-Pro)

cyclo(Gly-L-Leu-L-His-L-Phe-L-Ala-L-Phe-L-Pro)

A

L-alanin
56-41-7

L-alanin

B

L-leucine
61-90-5

L-leucine

C

L-phenylalanine
63-91-2

L-phenylalanine

D

glycine
56-40-6

glycine

E

L-proline
147-85-3

L-proline

F

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With hydrogenchloride; mercaptoacetic acid at 110℃; for 24h; Product distribution;
(S)-2-[(6-Bromo-1H-indole-3-carbonyl)-amino]-3-(1H-imidazol-4-yl)-propionic acid

(S)-2-[(6-Bromo-1H-indole-3-carbonyl)-amino]-3-(1H-imidazol-4-yl)-propionic acid

A

6-bromo-1H-indole-3-carboxylic acid
101774-27-0

6-bromo-1H-indole-3-carboxylic acid

B

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With hydrogenchloride at 120℃; for 12h; Product distribution;
blood substances

blood substances

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With hydrogenchloride Hydrolysis;
blood

blood

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With hydrogenchloride Hydrolysis;
bovine blood

bovine blood

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With hydrogenchloride
With hydrogenchloride
carnosine

carnosine

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With sulfuric acid Hydrolysis;
casein

casein

L-histidine
71-00-1

L-histidine

DL-histidine-hydrochloride

DL-histidine-hydrochloride

L-histidine
71-00-1

L-histidine

Conditions
ConditionsYield
With water bei Kristallisation;Produkt:Monohydrochlorid;
1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyridin-1-ium-3-carboxylate
17720-18-2

1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyridin-1-ium-3-carboxylate

L-histidine
71-00-1

L-histidine

1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyridin-1-ium-3-carboxylate (S)-2-ammonio-3-(1H-imidazol-4-yl)propanoate

1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)pyridin-1-ium-3-carboxylate (S)-2-ammonio-3-(1H-imidazol-4-yl)propanoate

Conditions
ConditionsYield
In water Cooling with ice;100%
nicotinic acid
59-67-6

nicotinic acid

L-histidine
71-00-1

L-histidine

(S)-1-carboxy-2-(1H-imidazol-4-yl)ethanaminium nicotinate

(S)-1-carboxy-2-(1H-imidazol-4-yl)ethanaminium nicotinate

Conditions
ConditionsYield
In water for 0.166667h; pH=Ca. 5.5 - 5.8; Cooling with ice;100%
methanol
67-56-1

methanol

L-histidine
71-00-1

L-histidine

L-Histidine methyl ester
1499-46-3

L-Histidine methyl ester

Conditions
ConditionsYield
With thionyl chloride at 40℃; for 36h;99%
With hydrogenchloride95%
With hydrogenchloride for 16h; Heating;
formaldehyd
50-00-0

formaldehyd

L-histidine
71-00-1

L-histidine

(S)-4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine-6-carboxylic acid dihydrochloric acid salt

(S)-4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine-6-carboxylic acid dihydrochloric acid salt

Conditions
ConditionsYield
Stage #1: formaldehyd; L-histidine With hydrogenchloride In water for 1.75h; Heating / reflux;
Stage #2: With hydrogenchloride In 1,4-dioxane; isopropyl alcohol for 0.5h;
99%
With hydrogenchloride In water at 0 - 75℃; for 6.5h;
methanol
67-56-1

methanol

[Co(2,2',2''-triaminotriethylamine)(L-alaninate)][toluene-p-sulphonate]

[Co(2,2',2''-triaminotriethylamine)(L-alaninate)][toluene-p-sulphonate]

L-histidine
71-00-1

L-histidine

[Co(2,2',2''-triaminotriethylamine)(Ala-L-HisOCH3)]Cl3

[Co(2,2',2''-triaminotriethylamine)(Ala-L-HisOCH3)]Cl3

Conditions
ConditionsYield
With N-ethylmorpholine;; toluene-4-sulfonic acid In methanol complex, amino-acid, sulphonic acid, dimethyl sulphite in methanol was esterified at 70 degree.C for 3 h, then N-ethylmorpholine was added; dild. with water, chromd. on Amberlite IRC 50 column (Na-form), evapn. to dryness, taken up in MeOH, filtration, evapn.;99%
hydrogenchloride
7647-01-0

hydrogenchloride

formaldehyd
50-00-0

formaldehyd

L-histidine
71-00-1

L-histidine

(S)-4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine-6-carboxylic acid dihydrochloric acid salt

(S)-4,5,6,7-tetrahydro-3H-imidazo[4,5-c]pyridine-6-carboxylic acid dihydrochloric acid salt

Conditions
ConditionsYield
Stage #1: formaldehyd; L-histidine With hydrogenchloride In water at 0℃; for 0.5h;
Stage #2: In water for 1.25h; Heating / reflux;
Stage #3: hydrogenchloride In 1,4-dioxane; isopropyl alcohol for 0.5h;
99%
acetic anhydride
108-24-7

acetic anhydride

L-histidine
71-00-1

L-histidine

N-acetyl-L-histidine
2497-02-1

N-acetyl-L-histidine

Conditions
ConditionsYield
With acetic acid for 15h; Reflux;98%
In water for 0.0666667h; Irradiation;96%
With acetic acid for 2h; Heating;68.9%
cholin hydroxide
123-41-1

cholin hydroxide

L-histidine
71-00-1

L-histidine

(2-hydroxyethyl)trimethylammonium L-histidinate
1361335-95-6

(2-hydroxyethyl)trimethylammonium L-histidinate

Conditions
ConditionsYield
In water at 3℃; Darkness;98%
In water at 3℃; for 48h; Darkness;95%
In water at 3℃; for 48h; Darkness;95%
L-histidine
71-00-1

L-histidine

5-((3H-diazirin-3-yl)methyl)-1H-imidazole

5-((3H-diazirin-3-yl)methyl)-1H-imidazole

Conditions
ConditionsYield
With [bis(acetoxy)iodo]benzene; ammonia In methanol at 0 - 20℃; for 2h; Reagent/catalyst; Inert atmosphere;98%
N-acetyl-β-alanine
3025-95-4

N-acetyl-β-alanine

L-histidine
71-00-1

L-histidine

N-acetyl-β-alanyl-L-histidine
56353-15-2

N-acetyl-β-alanyl-L-histidine

Conditions
ConditionsYield
With 2-chloro-1,3-dimethylimidazolinium chloride In ethanol at 40℃; for 3h; Concentration; Reagent/catalyst; Solvent; Temperature;97.9%
chloroacetic acid
79-11-8

chloroacetic acid

L-histidine
71-00-1

L-histidine

N,N,N',N''-tetra(carboxymethyl)histidine tetrasodium salt

N,N,N',N''-tetra(carboxymethyl)histidine tetrasodium salt

Conditions
ConditionsYield
Stage #1: L-histidine With potassium iodide; sodium hydroxide In water at 58℃; for 1.08333h; pH=9.5 - 10.5;
Stage #2: chloroacetic acid In water at 45 - 90℃;
97.8%
L-histidine
71-00-1

L-histidine

norcantharidin
29745-04-8

norcantharidin

L-histidine norcantharimide

L-histidine norcantharimide

Conditions
ConditionsYield
In ethanol; water for 48h; Reflux;97%
benzyl chloroformate
501-53-1

benzyl chloroformate

L-histidine
71-00-1

L-histidine

N-[(benzyloxy)carbonyl]-L-histidine
14997-58-1

N-[(benzyloxy)carbonyl]-L-histidine

Conditions
ConditionsYield
β‐cyclodextrin In various solvent(s) at 20℃; for 0.116667h; pH=8;96%
In ethyl acetate Heating;31%
With trimethylsilyl cyanide In tetrahydrofuran at -15℃; Yield given;
methanol
67-56-1

methanol

C11H11N3O4

C11H11N3O4

isobutyraldehyde
78-84-2

isobutyraldehyde

L-histidine
71-00-1

L-histidine

C23H32N6O7
1375004-50-4

C23H32N6O7

Conditions
ConditionsYield
at 20℃; for 48h; Ugi reaction; chemoselective reaction;96%
L-histidine
71-00-1

L-histidine

histamine
51-45-6

histamine

Conditions
ConditionsYield
cyclohexenone In various solvent(s) at 154℃; for 26h;95%
Conditions
ConditionsYield
With thionyl chloride at 0℃; for 16h; Inert atmosphere; Reflux;95%
With thionyl chloride at 0 - 20℃; for 6h; Inert atmosphere; Reflux;92%
With hydrogenchloride; sulfuric acid for 3h; Esterification; Heating;91%
2,4-dichlorobenzaldeyhde
874-42-0

2,4-dichlorobenzaldeyhde

L-histidine
71-00-1

L-histidine

4-(2,4-dichlorophenyl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-6-carboxylic acid

4-(2,4-dichlorophenyl)-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine-6-carboxylic acid

Conditions
ConditionsYield
With sodium hydroxide In water; isopropyl alcohol for 4h; Heating;95%
chromium chloride hexahydrate

chromium chloride hexahydrate

L-histidine
71-00-1

L-histidine

Cr(His)Cl3*H2O

Cr(His)Cl3*H2O

Conditions
ConditionsYield
In water dried over P2O5; elem. anal.;95%
chromium chloride hexahydrate

chromium chloride hexahydrate

L-histidine
71-00-1

L-histidine

Cr(His)3Cl3*H2O

Cr(His)3Cl3*H2O

Conditions
ConditionsYield
In water dried over P2O5; elem. anal.;95%
chromium chloride hexahydrate

chromium chloride hexahydrate

L-histidine
71-00-1

L-histidine

Cr(His)2Cl3*H2O

Cr(His)2Cl3*H2O

Conditions
ConditionsYield
In water dried over P2O5; elem. anal.;95%
chromium(III) nitrate hexahydrate

chromium(III) nitrate hexahydrate

L-histidine
71-00-1

L-histidine

[Cr(L-α-histidine)2(NO3)3]*3H2O

[Cr(L-α-histidine)2(NO3)3]*3H2O

Conditions
ConditionsYield
In water dried over P2O5; elem. anal.;95%
chromium(III) nitrate hexahydrate

chromium(III) nitrate hexahydrate

L-histidine
71-00-1

L-histidine

[Cr(L-α-histidine)3(NO3)3]*3H2O

[Cr(L-α-histidine)3(NO3)3]*3H2O

Conditions
ConditionsYield
In water dried over P2O5; elem. anal.;95%
chromium(III) nitrate hexahydrate

chromium(III) nitrate hexahydrate

L-histidine
71-00-1

L-histidine

[Cr(L-α-histidine)(NO3)3]*3H2O

[Cr(L-α-histidine)(NO3)3]*3H2O

Conditions
ConditionsYield
In water dried over P2O5; elem. anal.;95%
N-((1,3-dioxolan-4-yl)methyl)-N,N,N-triethylammonium hydroxide

N-((1,3-dioxolan-4-yl)methyl)-N,N,N-triethylammonium hydroxide

L-histidine
71-00-1

L-histidine

N-((1,3-dioxolan-4-yl)methyl)-N,N,N-triethylammonium L-histidinate

N-((1,3-dioxolan-4-yl)methyl)-N,N,N-triethylammonium L-histidinate

Conditions
ConditionsYield
In water at 20℃; for 48h; Darkness; Cooling;95%
9-methoxyacridine
10228-90-7

9-methoxyacridine

L-histidine
71-00-1

L-histidine

(S)-2-(Acridin-9-ylamino)-3-(1H-imidazol-4-yl)-propionic acid

(S)-2-(Acridin-9-ylamino)-3-(1H-imidazol-4-yl)-propionic acid

Conditions
ConditionsYield
In methanol for 10h; Heating;94%
(E)-1-methoxy-4-(2-nitrovinyl)benzene
3179-10-0, 5576-97-6

(E)-1-methoxy-4-(2-nitrovinyl)benzene

L-histidine
71-00-1

L-histidine

5-trifluoromethoxy-1H-indole-2,3-dione
169037-23-4

5-trifluoromethoxy-1H-indole-2,3-dione

5'-((1H-imidazol-4-yl)methyl)-3'-(4-methoxyphenyl)-4'-nitro-5-(trifluoro methoxy) spiro[indoline-3,2'-pyrrolidin]-2-one

5'-((1H-imidazol-4-yl)methyl)-3'-(4-methoxyphenyl)-4'-nitro-5-(trifluoro methoxy) spiro[indoline-3,2'-pyrrolidin]-2-one

Conditions
ConditionsYield
With 1-n-butyl-3-methylimidazolim bromide at 100℃; Ionic liquid; diastereoselective reaction;94%
C6H10N2O2

C6H10N2O2

2-(4-dimethylamino-1,8-naphthalimido)ethyl isocyanide
1352831-40-3

2-(4-dimethylamino-1,8-naphthalimido)ethyl isocyanide

L-histidine
71-00-1

L-histidine

(3S,5R,6S)-3-((1H-imidazol-5-yl)methyl)-N-(2-(6-(dimethylamino)-1,3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl)ethyl)-2-oxo-1,4-diazabicyclo[4.1.0]heptane-5-carboxamide
1352831-43-6

(3S,5R,6S)-3-((1H-imidazol-5-yl)methyl)-N-(2-(6-(dimethylamino)-1,3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl)ethyl)-2-oxo-1,4-diazabicyclo[4.1.0]heptane-5-carboxamide

Conditions
ConditionsYield
In 2,2,2-trifluoroethanol at 20℃; for 1.5h;93%

L-Histidine Consensus Reports

Reported in EPA TSCA Inventory.

L-Histidine Specification

1. Introduction of L-Histidine

L-Histidine, with the IUPAC Name: (2S)-2-Amino-3-(1H-imidazol-5-yl)propanoic acid, is one kind of white crystal powder. Histidine is used for food additives  and raw materials of pharmaceutical .

2. Properties of L-Histidine

L-Histidine has the following datas: (1)Classification Code: Amino acid; Mutation data; (2)Melting point: 282 °C; (3)Index of Refraction: 1.614; (4)Molar Refractivity: 38.01 cm3; (5)Molar Volume: 108.9 cm3; (6)Surface Tension: 79.6 dyne/cm; (7)Density: 1.423 g/cm3; (8)Flash Point: 231.3 °C; (9)Enthalpy of Vaporization: 75.79 kJ/mol; (10)Boiling Point: 458.9 °C at 760 mmHg; (11)Vapour Pressure: 3.25E-09 mmHg at 25°C.

3. Structure Descriptors of L-Histidine

You could convert the following datas into the molecular structure:
InChI: InChI=1S/C6H9N3O2/c7-5(6(10)11)1-4-2-8-3-9-4/h2-3,5H,1,7H2,(H,8,9)(H,10,11)/t5-/m0/s1 
InChIKey: InChIKey=HNDVDQJCIGZPNO-YFKPBYRVSA-N 
Smiles: c1(C[C@@H](C(O)=O)N)c[nH]cn1

4. Toxicity of L-Histidine

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal > 10gm/kg (10000mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 23, Pg. 1253, 1981.
mouse LD50 intravenous > 2gm/kg (2000mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 23, Pg. 1253, 1981.
mouse LD50 oral > 15gm/kg (15000mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 23, Pg. 1253, 1981.
mouse LD50 subcutaneous > 10gm/kg (10000mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 23, Pg. 1253, 1981.
rat LD50 intraperitoneal > 8gm/kg (8000mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 23, Pg. 1253, 1981.
rat LD50 intravenous > 2gm/kg (2000mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 23, Pg. 1253, 1981.
rat LD50 oral > 15gm/kg (15000mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 23, Pg. 1253, 1981.
rat LD50 subcutaneous > 10gm/kg (10000mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 23, Pg. 1253, 1981.

5. Safety Information of L-Histidine

Human mutation data reported. When heated to decomposition it emits toxic fumes of NOx.
Other safty informations about Histidine (CAS NO.71-00-1):
Hazard Codes: HarmfulXn
Risk Statements: 22-36/37/38 
R22: Harmful if swallowed. 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 24/25-36/37-26-22 
S24/25: Avoid contact with skin and eyes. 
S36/37: Wear suitable protective clothing and gloves. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S22: Do not breathe dust.
WGK Germany: 2
RTECS: MS3070000
F: 10-23
HS Code: 29332990

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