Naloxone HCl

Modify Date: 2025-08-21 19:31:49

Naloxone HCl structure	Common Name	Naloxone HCl
	CAS Number	357-08-4	Molecular Weight	363.84
	Density	N/A	Boiling Point	532.8ºC at 760 mmHg
	Molecular Formula	C₁₉H₂₂ClNO₄	Melting Point	200-2050C
	MSDS	N/A	Flash Point	276.1ºC

Use of Naloxone HCl

Naloxone hydrochloride is a potent opioid receptor antagonist.

Name	Naloxone Hydrochloride
Synonym	More Synonyms

Description	Naloxone hydrochloride is a potent opioid receptor antagonist.
Related Catalog	Signaling Pathways >> GPCR/G Protein >> Opioid Receptor Signaling Pathways >> Neuronal Signaling >> Opioid Receptor Research Areas >> Neurological Disease
In Vivo	Naloxone (2.0 mg/kg with constant infusion of 1.7 mg/kg/h) causes a significant improvement in neurobehavioral outcome which persists up to 4 weeks postinjury in rat. Naloxone treatment causes a modest and nonsignificant increase in mean arterial blood pressure (MAP)[1]. Naloxone (0.4 mg/kg) causes memory facilitation and antagonizes the amnestic effect of ACTH and epinephrine in rat[2]. Naloxone treatment diminishes the strength of the initial tetanus in a dose-related manner in cats. Naloxone (5 or 10 mg/kg, i.v.) causes subsequent doses of morphine to produce less PTP depression but has no effect on maximal twitch depression[3].
Animal Admin	Young adult Wistar rats are used in the assay: females for experiments l and 3 (age 50-70 days, weight 100-185 g) and males for experiments 2 and 4 (age 51-69 days, weight 140-200 g). The same apparatus is used for both: a 50×25×25 cm box made of plywood with a frontal glass wall, whose floor consists of 1 mm-caliber bronze bars spaced l0 mm apart. In task l, a 5 cm high, 25×25 cm wooden platform is introduced into the box so as to cover the left half of the grid. Rats are held gently by their bodies and loared onto the platform facing the rear left corner, at which time a quartz chronometer is activated. Time is counted until the animals stepped down from the platform and placed their four paws on the grid, upon which a 0.5 mA, 60 Hz footshock is continuously delivered until the animals return to the platform. In task 2 the platform is only 7 cm wide and covered only the leftmost seven bars of the grid; the footshock is of only 0.3 mA and is delivered in 0.4 msec pulses once every 2 sec until the animals climb back onto the platform. Immediately after training in each task the animals are withdrawn from the box injected i.p. with one of the following: saline (1.0 mL/kg), ACTH1-24 (0.2 or 2.0 μg/kg), epinephrine HCl (5.0 or 50.0 μg/kg), human β-endorphin (0.1 or 1.0 μg/kg), naloxone HCl (0.4 mg/kg), or ACTH or epinephrine given together with either β-endorphin or naloxone. All drugs are dissolved in saline to an injection volume of 1.0 mL/kg. Twenty-four hr after training the animals again are placed on the platform (the wide one for task 1, experiments 1 and 2, and the narrow one for task 2, experiments 3 and 4), and their latency to stepdown onto the grid again is measured as in the training session. A ceiling of 180 sec is imposed on this measure.
References	[1]. McIntosh TK, et al. Beneficial effect of the nonselective opiate antagonist naloxone hydrochloride and the thyrotropin-releasing hormone (TRH) analog YM-14673 on long-term neurobehavioral outcome following experimental brain injury in the rat. J Neurotrau [2]. Sun L, et al. Endocannabinoid activation of CB1 receptors contributes to long-lasting reversal of neuropathic pain by repetitive spinal cord stimulation. Eur J Pain. 2017 May;21(5):804-814. [3]. Izquierdo I, et al. Effect of ACTH, epinephrine, beta-endorphin, naloxone, and of the combination of naloxone or beta-endorphinwith ACTH or epinephrine on memory consolidation. Psychoneuroendocrinology. 1983;8(1):81-7. [4]. Soteropoulos GC, et al. Neuromuscular effects of morphine and naloxone. J Pharmacol Exp Ther. 1973 Jan;184(1):136-42.

Boiling Point	532.8ºC at 760 mmHg
Melting Point	200-2050C
Molecular Formula	C₁₉H₂₂ClNO₄
Molecular Weight	363.84
Flash Point	276.1ºC
Exact Mass	363.123749
PSA	70.00000
LogP	2.04130
InChIKey	RGPDIGOSVORSAK-STHHAXOLSA-N
SMILES	C=CCN1CCC23c4c5ccc(O)c4OC2C(=O)CCC3(O)C1C5.Cl
Storage condition	2-8°C
Water Solubility	ethanol: 3.3 mg/mL stable for several months refrigerated if protected from light.

CHEMICAL IDENTIFICATION

RTECS NUMBER :: QD2275000

CHEMICAL NAME :: Morphinan-6-one, 4,5-epoxy-3,14-dihydroxy-17-(2-propenyl)-, hydrochloride, (5-alpha)-

CAS REGISTRY NUMBER :: 357-08-4

LAST UPDATED :: 199806

DATA ITEMS CITED :: 16

MOLECULAR FORMULA :: C19-H21-N-O4.Cl-H

MOLECULAR WEIGHT :: 363.87

WISWESSER LINE NOTATION :: T B6566 B6/CO 4ABBC R BX FV HO PN GHT&&TTJ CQ JQ P2U1 &GH

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Human - woman

DOSE/DURATION :: 32 ug/kg/3M-C

TOXIC EFFECTS :: Cardiac - pulse rate increase, without fall in BP Lungs, Thorax, or Respiration - acute pulmonary edema Skin and Appendages - sweating

REFERENCE :: AEMED3 Annals of Emergency Medicine. (American College of Emergency Physicians, 1125 Executive Circle, Irving, TX 75038) Volume(issue)/page/year: 16,1294,1987

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Human - man

DOSE/DURATION :: 13 ug/kg

TOXIC EFFECTS :: Behavioral - convulsions or effect on seizure threshold

REFERENCE :: AJEMEN American Journal of Emergency Medicine. (WB Saunders, Philadelphia, PA) V.1- 1983- Volume(issue)/page/year: 7,127,1989

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: >1 gm/kg

TOXIC EFFECTS :: Behavioral - convulsions or effect on seizure threshold Gastrointestinal - changes in structure or function of salivary glands Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: YKYUA6 Yakkyoku. Pharmacy. (Nanzando, 4-1-11, Yushima, Bunkyo-ku, Tokyo, Japan) V.1- 1950- Volume(issue)/page/year: 36,655,1985

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 239 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: IYKEDH Iyakuhin Kenkyu. Study of Medical Supplies. (Nippon Koteisho Kyokai, 12-15, 2-chome, Shibuya, Shibuya-ku, Tokyo 150, Japan) V.1- 1970- Volume(issue)/page/year: 16,357,1985

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 500 mg/kg

TOXIC EFFECTS :: Behavioral - convulsions or effect on seizure threshold Gastrointestinal - changes in structure or function of salivary glands Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: YKYUA6 Yakkyoku. Pharmacy. (Nanzando, 4-1-11, Yushima, Bunkyo-ku, Tokyo, Japan) V.1- 1950- Volume(issue)/page/year: 36,655,1985

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 107 mg/kg

TOXIC EFFECTS :: Behavioral - convulsions or effect on seizure threshold Gastrointestinal - changes in structure or function of salivary glands Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: YKYUA6 Yakkyoku. Pharmacy. (Nanzando, 4-1-11, Yushima, Bunkyo-ku, Tokyo, Japan) V.1- 1950- Volume(issue)/page/year: 36,655,1985

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: >1 gm/kg

TOXIC EFFECTS :: Behavioral - convulsions or effect on seizure threshold Gastrointestinal - changes in structure or function of salivary glands Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: YKYUA6 Yakkyoku. Pharmacy. (Nanzando, 4-1-11, Yushima, Bunkyo-ku, Tokyo, Japan) V.1- 1950- Volume(issue)/page/year: 36,655,1985

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 80 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: RCOCB8 Research Communications in Chemical Pathology and Pharmacology. (PJD Pub. Ltd., P.O. Box 966, Westbury, NY 11590) V.1- 1970- Volume(issue)/page/year: 17,255,1977

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 286 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: JMCMAR Journal of Medicinal Chemistry. (American Chemical Soc., Distribution Office Dept. 223, POB POB 57136, West End Stn., Washington, DC 20037) V.6- 1963- Volume(issue)/page/year: 20,844,1977

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 90 mg/kg

TOXIC EFFECTS :: Behavioral - convulsions or effect on seizure threshold Gastrointestinal - changes in structure or function of salivary glands Lungs, Thorax, or Respiration - dyspnea

REFERENCE :: YKYUA6 Yakkyoku. Pharmacy. (Nanzando, 4-1-11, Yushima, Bunkyo-ku, Tokyo, Japan) V.1- 1950- Volume(issue)/page/year: 36,655,1985 ** REPRODUCTIVE DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Intraperitoneal

DOSE :: 560 mg/kg

SEX/DURATION :: female 7-20 day(s) after conception

TOXIC EFFECTS :: Reproductive - Effects on Newborn - behavioral

REFERENCE :: NTOTDY Neurobehavioral Toxicology and Teratology. (Fayetteville, NY) V.3-8, 1981-86. For publisher information, see NETEEC. Volume(issue)/page/year: 3,295,1981

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Subcutaneous

DOSE :: 18 mg/kg

SEX/DURATION :: female 14-22 day(s) after conception

TOXIC EFFECTS :: Reproductive - Effects on Newborn - growth statistics (e.g.%, reduced weight gain) Reproductive - Effects on Newborn - behavioral

REFERENCE :: NTOTDY Neurobehavioral Toxicology and Teratology. (Fayetteville, NY) V.3-8, 1981-86. For publisher information, see NETEEC. Volume(issue)/page/year: 5,479,1983

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Subcutaneous

DOSE :: 75 mg/kg

SEX/DURATION :: female 4-18 day(s) after conception

TOXIC EFFECTS :: Reproductive - Specific Developmental Abnormalities - Central Nervous System Reproductive - Effects on Newborn - behavioral

REFERENCE :: NETEEC Neurotoxicology and Teratology. (Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, NY 10523) V.9- 1987- Volume(issue)/page/year: 11,441,1989

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Intravenous

DOSE :: 1800 ug/kg

SEX/DURATION :: lactating female 1 day(s) post-birth

TOXIC EFFECTS :: Reproductive - Maternal Effects - other effects Endocrine - changes in luteinizing hormone

REFERENCE :: THGNBO Theriogenology. (Geron-X, Inc., P.O. Box 1108, Los Altos, CA 94022) V.1- 1974- Volume(issue)/page/year: 39,1193,1993

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Intravenous

DOSE :: 3 mg/kg

SEX/DURATION :: lactating female 2 hour(s) post-birth

TOXIC EFFECTS :: Reproductive - Specific Developmental Abnormalities - endocrine system

REFERENCE :: BIREBV Biology of Reproduction. (Soc. for the Study of Reproduction, 309 W. Clark St., Champaign, IL 61820) V.1- 1969- Volume(issue)/page/year: 39,532,1988 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X5315 No. of Facilities: 152 (estimated) No. of Industries: 1 No. of Occupations: 5 No. of Employees: 10824 (estimated) No. of Female Employees: 9407 (estimated)

Hazard Codes	Xi: Irritant;
Risk Phrases	R36/37/38
Safety Phrases	S22-S24/25-S26-S36/37/39
WGK Germany	3

oxycodone hydro...

CAS#:124-90-3

Naloxone HCl

CAS#:357-08-4

Literature: US2003/69263 A1, ;

Precursor 1
CAS#:124-90-3 oxycodone hydro...
DownStream 1
CAS#:465-65-6 Naloxone

Name: Primary cell-based high-throughput screening assay for identification of compounds th...
Source: Johns Hopkins Ion Channel Center
Target: regulator of G-protein signaling 4 isoform 2 [Homo sapiens]
External Id: JHICC_RGS_Act_HTS

Name: Luminescence-based cell-based primary high throughput screening assay to identify ago...
Source: The Scripps Research Institute Molecular Screening Center
Target: mu-type opioid receptor isoform MOR-1 [Homo sapiens]
External Id: OPRM1-OPRD1_AG_LUMI_1536_1X%ACT PRUN

Name: Induction of neurosphere phenotype changes in mouse neural precursor cells at 3 uM
Source: ChEMBL
Target: N/A
External Id: CHEMBL1266186

Name: QFRET-based biochemical primary high throughput screening assay to identify exosite i...
Source: The Scripps Research Institute Molecular Screening Center
Target: disintegrin and metalloproteinase domain-containing protein 17 preproprotein [Homo sapiens]
External Id: ADAM17_INH_QFRET_1536_1X%INH PRUN

Name: Inhibition of neurosphere proliferation of mouse neural precursor cells by MTT assay
Source: ChEMBL
Target: N/A
External Id: CHEMBL1266185

Name: ERK5 transcriptional activity HTS
Source: 24565
Target: N/A
External Id: ERK5 transcriptional activity-HTS

Name: Fluorescence-based cell-based primary high throughput screening assay to identify ago...
Source: The Scripps Research Institute Molecular Screening Center
Target: muscarinic acetylcholine receptor M1 [Homo sapiens]
External Id: CHRM1_AG_FLUO8_1536_1X%ACT PRUN

Name: The ability to reverse an ED50 dose of morphine when tested in mice by the tail-flick...
Source: ChEMBL
Target: Mus musculus
External Id: CHEMBL714774

Name: Antibacterial activity against Staphylococcus aureus MRSA ATCC 43300 (CO-ADD:GP_020);...
Source: ChEMBL
Target: Staphylococcus aureus
External Id: CHEMBL4296184

Name: The ability to reverse an ED50 dose of morphine when tested in mice by the tail-flick...
Source: ChEMBL
Target: Mus musculus
External Id: CHEMBL713003

Total 178, Current Page 1 of 18

(5α)-3,14-dihydroxy-17-(prop-2-en-1-yl)-4,5-epoxymorphinan-6-one hydrochloride (1:1)

(1S,5R,13R,17S)-10,17-dihydroxy-4-prop-2-en-1-yl-12-oxa-4-azapentacyclo[9.6.1.0.0.0]octadeca-7(18),8,10-trien-14-one hydrochloride

(5α)-17-Allyl-4,5-epoxy-3,14-dihydroxymorphinan-6-one hydrochloride

Morphinan-6-one, 17-allyl-4,5-α-epoxy-3,14-dihydroxy-, hydrochloride

Narcanti

MFCD00069322

17-Allyl-4,5α-epoxy-3,14-dihydroxymorphinan-6-one hydrochloride

Naloxone hydrochloride

Nalone

morphinan-6-one, 4,5-epoxy-3,14-dihydroxy-17-(2-propenyl)-, (5α)-, hydrochloride

17-Allyl-4,5-a-epoxy-3,14-dihydroxymorphinan-6-one Hydrochloride

17-Allyl-4,5-α-epoxy-3,14-dihydroxymorphinan-6-one hydrochloride

NALOXONE HCL

(4R,4aS,7aR,12bS)-4a,9-dihydroxy-3-prop-2-enyl-2,4,5,6,7a,13-hexahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinoline-7-one,hydrochloride

(-)-N-Allyl-14-hydroxynordihydromorphinone hydrochloride

EINECS 206-611-0

(5α)-17-Allyl-3,14-dihydroxy-4,5-epoxymorphinan-6-one hydrochloride (1:1)

Narcan

(5α)-3,14-dihydroxy-17-prop-2-en-1-yl-4,5-epoxymorphinan-6-one hydrochloride

UNII-F850569PQR

Morphinan-6-one, 4,5-epoxy-3,14-dihydroxy-17-(2-propen-1-yl)-, (5α)-, hydrochloride (1:1)

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Naloxone HCl

Use of Naloxone HCl

Names

Naloxone HCl Biological Activity

Chemical & Physical Properties

Toxicological Information

CHEMICAL IDENTIFICATION

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

Safety Information

Synthetic Route

Precursor & DownStream

Naloxone HClBioassay

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