Dayang Chem (Hangzhou) Co., Ltd.
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Product Name: Pemirolast Potassium
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Purity: 98.0%
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100299-08-9

100299-08-9 structure

Name: Pemirolast potassium
Chemical Name: Pemirolast Potassium Hydrate
CAS Number: 100299-08-9
Molecular Formula: C₁₀H₇KN₆O
Molecular Weight: 266.301
Catalog: API Antiallergic Allergic reaction medium blocker
Create Date: 2018-12-24 16:20:50
Modify Date: 2026-07-13 01:24:43
Pemirolast Potassium (BMY 26517) is a histamine H1 antagonist and mast cell stabilizer that acts as an antiallergic agent.Target: Histamine H1 ReceptorPemirolast potassium (BMY 26517) is a new oral, nonbronchodilator antiallergy medication that is being evaluated for the therapy of asthma [1]. Pemirolast potassium (BMY 26517) inhibits chemical mediator release from tissue mast cells and is also shown to inhibit the release of peptides including substance P, Pemirolast potassium (BMY 26517) reduces kaolin intake by inhibition of substance P release in rats [2]. Pemirolast potently attenuates paclitaxel hypersensitivity reactions through inhibition of the release of sensory neuropeptides in rats [3]. Pemirolast potassium is used for the treatment of allergic conjunctivitis and prophylaxis for pulmonary hypersensitivity reactions to drugs such as paclitaxel [4].

Name	Pemirolast Potassium Hydrate
Synonyms	Pemirolast Potassium RS 9-methyl-3-(2H-tetrazol-5-yl)-4H-Pyrido[1,2-a]pyrimidin-4-one potassiumsalt pemirolastpottassium bmy26517 tbx Potassium 5-(9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-3-yl)tetrazol-1-ide DE-068 Pemirolast potassium //BP Pemirolast Potassium Salt 9-Methyl-3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-one Potassium Salt Pemirolast Potassiun Potassium 5-(9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-3-yl)tetrazol-2-ide potassium 9-methyl-3-(2H-tetrazol-5-yl)-4-pyrido[1,2-a]pyrimidinone potassium,9-methyl-3-(1,2,3-triaza-4-azanidacyclopenta-2,5-dien-5-yl)pyrido[1,2-a]pyrimidin-4-one 9-Methyl-3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidine-4-one/potassium,(1:1) Famitinib Impurity 4 10-methyl-4-(2h-tetrazol-5-yl)-2,6-diazabicyclo[4.4.0]deca-1,3,7,9-tetraen-5-one potassium 4H-Pyrido[1,2-a]pyrimidin-4-one, 9-methyl-3-(2H-tetrazol-5-yl)-, potassium salt (1:1) 9-methyl-3-(1h-tetrazol-5-yl)-4h-pyrido(1,2-a)pyrimidin-4-onotassiumsalt MFCD01690051 4H-Pyrido[1,2-a]pyrimidin-4-one, 9-methyl-3-(1H-tetrazol-5-yl)-, potassium salt (1:1) Pemirolast (potassium) Alamast potassium 5-(9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-3-yl)tetrazol-1-ide PEMIROLAST POTASSIUM 9-Methyl-3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-one Potassium Salt Hydrate Pemirolast potassium (TWT-8152 9-Methyl-3-(2H-tetrazol-5-yl) 2-a)pyrimidin-4-one,9-methyl-3-(1h-tetrazol-5-yl)-4h-pyrido(potassiumsalt Alegysal (TN) PemirolastPotassiumconsultedStandd 4H-pyrido[1,2-a]pyrimidin-4-one, 9-methyl-3-(1H-tetrazol-5-yl)-, potassium salt Alegysal Alamast, Pemirolast potassium Pemirolast potassium - Bio-X 9-Methyl-3-(1H-Tetrazol-5-yl)-4H-Pyrido[1,2a] pyrimidin-4-one Potassium PeMirolast PotassiuM Hydrate TWT-8152

Description	Pemirolast Potassium (BMY 26517) is a histamine H1 antagonist and mast cell stabilizer that acts as an antiallergic agent.Target: Histamine H1 ReceptorPemirolast potassium (BMY 26517) is a new oral, nonbronchodilator antiallergy medication that is being evaluated for the therapy of asthma [1]. Pemirolast potassium (BMY 26517) inhibits chemical mediator release from tissue mast cells and is also shown to inhibit the release of peptides including substance P, Pemirolast potassium (BMY 26517) reduces kaolin intake by inhibition of substance P release in rats [2]. Pemirolast potently attenuates paclitaxel hypersensitivity reactions through inhibition of the release of sensory neuropeptides in rats [3]. Pemirolast potassium is used for the treatment of allergic conjunctivitis and prophylaxis for pulmonary hypersensitivity reactions to drugs such as paclitaxel [4].
Related Catalog	Signaling Pathways >> GPCR/G Protein >> Histamine Receptor Signaling Pathways >> Immunology/Inflammation >> Histamine Receptor Research Areas >> Inflammation/Immunology
References	[1]. Kemp, J.P., et al., Pemirolast, a new oral nonbronchodilator drug for chronic asthma. Ann Allergy, 1992. 68(6): p. 488-91. [2]. Tatsushima, Y., et al., Pemirolast reduces cisplatin-induced kaolin intake in rats. Eur J Pharmacol, 2011. 661(1-3): p. 57-62. [3]. Itoh, Y., et al., Pemirolast potently attenuates paclitaxel hypersensitivity reactions through inhibition of the release of sensory neuropeptides in rats. Neuropharmacology, 2004. 46(6): p. 888-94. [4]. Abelson, M.B., et al., Pemirolast potassium 0.1% ophthalmic solution is an effective treatment for allergic conjunctivitis: a pooled analysis of two prospective, randomized, double-masked, placebo-controlled, phase III studies. J Ocul Pharmacol Ther, 2002. 18(5): p. 475-88.

Boiling Point	454.8ºC at 760mmHg
Melting Point	310-311ºC (dec.)
Molecular Formula	C₁₀H₇KN₆O
Molecular Weight	266.301
Flash Point	228.9ºC
Exact Mass	266.031830
PSA	77.97000
Vapour Pressure	1.85E-08mmHg at 25°C
Storage condition	-20°C Freezer, Under Inert Atmosphere

CHEMICAL IDENTIFICATION

RTECS NUMBER :: UV1164470

CHEMICAL NAME :: 4H-Pyrido(1,2-a)pyrimidin-4-one, 9-methyl-3-(1H-tetrazol-5-yl)-, potassium salt

CAS REGISTRY NUMBER :: 100299-08-9

LAST UPDATED :: 199806

DATA ITEMS CITED :: 14

MOLECULAR FORMULA :: C10-H7-N6-O.K

MOLECULAR WEIGHT :: 266.33

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 687 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: 23,682,1992

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

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 430 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: 23,682,1992

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

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 372 mg/kg

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

REFERENCE :: JKXXAF Japanese Kokai Tokyo Koho Patents. (U.S. Patent and Trademark Office, Foreign Patents, Washington, DC 20231) Volume(issue)/page/year: #95-69895

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 1185 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: 23,682,1992

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

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 511 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: 23,682,1992

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

ROUTE OF EXPOSURE :: Subcutaneous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 543 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: 23,682,1992

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

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 220 mg/kg

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

REFERENCE :: JKXXAF Japanese Kokai Tokyo Koho Patents. (U.S. Patent and Trademark Office, Foreign Patents, Washington, DC 20231) Volume(issue)/page/year: #95-69895

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Mammal - dog

DOSE/DURATION :: >6 gm/kg

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

REFERENCE :: NIIRDN Drugs in Japan (Ethical Drugs). (Yakugyo Jiho Co., Ltd., Tokyo, Japan) Volume(issue)/page/year: -,1259,1995 ** OTHER MULTIPLE DOSE TOXICITY DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Mammal - dog

DOSE/DURATION :: 13650 mg/kg/13W-I

TOXIC EFFECTS :: Endocrine - changes in spleen weight Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol) Nutritional and Gross Metabolic - weight loss or decreased weight gain

REFERENCE :: YACHDS Yakuri to Chiryo. Pharmacology and Therapeutics. (Raifu Saiensu Shuppan K.K., 2-5-13, Yaesu, Chuo-ku, Tokyo 104, Japan) V.1- 1972- Volume(issue)/page/year: 17,1153,1989

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Mammal - dog

DOSE/DURATION :: 27375 mg/kg/52W-I

TOXIC EFFECTS :: Liver - other changes Blood - changes in serum composition (e.g. TP, bilirubin, cholesterol) Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - phosphatases

REFERENCE :: YACHDS Yakuri to Chiryo. Pharmacology and Therapeutics. (Raifu Saiensu Shuppan K.K., 2-5-13, Yaesu, Chuo-ku, Tokyo 104, Japan) V.1- 1972- Volume(issue)/page/year: 17,1183,1989 ** REPRODUCTIVE DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 2800 mg/kg

SEX/DURATION :: female 1-7 day(s) after conception

TOXIC EFFECTS :: Reproductive - Fertility - post-implantation mortality (e.g. dead and/or resorbed implants per total number of implants)

REFERENCE :: YACHDS Yakuri to Chiryo. Pharmacology and Therapeutics. (Raifu Saiensu Shuppan K.K., 2-5-13, Yaesu, Chuo-ku, Tokyo 104, Japan) V.1- 1972- Volume(issue)/page/year: 18,893,1990

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 2750 mg/kg

SEX/DURATION :: female 7-17 day(s) after conception

TOXIC EFFECTS :: Reproductive - Maternal Effects - parturition Reproductive - Effects on Embryo or Fetus - fetotoxicity (except death, e.g., stunted fetus) Reproductive - Specific Developmental Abnormalities - musculoskeletal system

REFERENCE :: YACHDS Yakuri to Chiryo. Pharmacology and Therapeutics. (Raifu Saiensu Shuppan K.K., 2-5-13, Yaesu, Chuo-ku, Tokyo 104, Japan) V.1- 1972- Volume(issue)/page/year: 18,921,1990

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 4400 mg/kg

SEX/DURATION :: female 7-17 day(s) after conception

TOXIC EFFECTS :: Reproductive - Specific Developmental Abnormalities - cardiovascular (circulatory) system Reproductive - Specific Developmental Abnormalities - other developmental abnormalities Reproductive - Effects on Newborn - behavioral

REFERENCE :: YACHDS Yakuri to Chiryo. Pharmacology and Therapeutics. (Raifu Saiensu Shuppan K.K., 2-5-13, Yaesu, Chuo-ku, Tokyo 104, Japan) V.1- 1972- Volume(issue)/page/year: 18,921,1990

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

DOSE :: 550 mg/kg

SEX/DURATION :: female 7-17 day(s) after conception

TOXIC EFFECTS :: Reproductive - Effects on Newborn - viability index (e.g., # alive at day 4 per # born alive)

REFERENCE :: YACHDS Yakuri to Chiryo. Pharmacology and Therapeutics. (Raifu Saiensu Shuppan K.K., 2-5-13, Yaesu, Chuo-ku, Tokyo 104, Japan) V.1- 1972- Volume(issue)/page/year: 18,921,1990

Symbol	GHS07
Signal Word	Warning
Hazard Statements	H302
Hazard Codes	Xi
RIDADR	NONH for all modes of transport

69372-19-6

~10%

100299-08-9

Literature: Sano, Atsunori; Ishihara, Masami Heterocycles, 1998 , vol. 48, # 4 p. 775 - 778

1603-40-3

100299-08-9

Literature: Heterocycles, , vol. 48, # 4 p. 775 - 778

Precursor 2
69372-19-6 1603-40-3
DownStream 0

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