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Excepted Quantity	USD 0.00
Limited Quantity	USD 15-60
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Inaccessible (Haz class 6.1), International	USD 150+
Accessible (Haz class 3, 4, 5 or 8), Domestic	USD 100+
Accessible (Haz class 3, 4, 5 or 8), International	USD 200+

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CAS No. :	26046-90-2
Formula :	C₄H₉NO₂Se
M.W :	182.08
SMILES Code :	O=C(O)[C@@H](N)C[Se]C
Synonyms :	Methylselenocysteine; Se-Methylseleno-L-cysteine; SeMCys
MDL No. :	MFCD00800565
InChI Key :	XDSSPSLGNGIIHP-VKHMYHEASA-N
Pubchem ID :	147004

GHS Pictogram:
Signal Word:	Danger
Hazard Statements:	H301+H331-H373-H410
Precautionary Statements:	P501-P273-P260-P270-P271-P264-P391-P314-P301+P310+P330-P304+P340+P311-P403+P233-P405
Class:	6.1
UN#:	3283
Packing Group:	Ⅲ

Caenorhabditis elegans (C. elegans)	100 μM	18 h	To study the bioavailability, protein incorporation, and modulation of the antioxidant defense system by Se-Methylselenocysteine. Results showed that all tested selenium compounds were bioavailable, but only SeMet persistently accumulated and was non-specifically incorporated into proteins. However, the protection against chemically-induced reactive species formation was independent of the applied selenium compound.	Mol Nutr Food Res. 2019 May;63(9):e1801304
HuH-28 (cholangiocarcinoma cell line)	15, 30, 60, 120 μM	72 hours	Measure miRNA expression changes, results showed increased miR-122, -199a	Pathol Oncol Res. 2020 Oct;26(4):2669-2681
TFK-1 (cholangiocarcinoma cell line)	240, 480, 960 μM	72 hours	Measure miRNA expression changes, results showed increased miR-143	Pathol Oncol Res. 2020 Oct;26(4):2669-2681
HLF (hepatocellular carcinoma cell line)	15, 30, 60, 120 μM	72 hours	Measure miRNA expression changes, results showed increased miR-122 and decreased miR-199a	Pathol Oncol Res. 2020 Oct;26(4):2669-2681
HMEC cells	1500 ng Se/mL	24, 48, 72, and 96 h	Evaluate the effects of Se-Methylselenocysteine on the growth of HMEC cells. Results showed that MSC at 1500 ng Se/mL did not significantly inhibit the growth of HMEC cells.	Int J Med Sci. 2015 Sep 5;12(9):748-58
MDA-MB-231 cells	1500 ng Se/mL	24, 48, 72, and 96 h	Evaluate the effects of Se-Methylselenocysteine on growth inhibition and apoptosis in MDA-MB-231 cells. Results showed that MSC at 1500 ng Se/mL inhibited the growth of MDA-MB-231 cells, but the effect was lower than MSA.	Int J Med Sci. 2015 Sep 5;12(9):748-58
MCF-7 cells	1500 ng Se/mL	24, 48, 72, and 96 h	Evaluate the effects of Se-Methylselenocysteine on growth inhibition and apoptosis in MCF-7 cells. Results showed that MSC at 1500 ng Se/mL inhibited the growth of MCF-7 cells, but the effect was lower than MSA.	Int J Med Sci. 2015 Sep 5;12(9):748-58
HepG2 cells	1.25~20 µg/mL	24 hours	Evaluate the effect of MSC on glucose consumption in HepG2 cells, results showed MSC (5 µg/mL) significantly increased glucose consumption	Molecules. 2023 Jul 19;28(14):5499

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CAS No.: 26046-90-2

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CAS No.: 26046-90-2

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Product Details of H-3-(Me-Se)-Ala-OH

Safety of H-3-(Me-Se)-Ala-OH

Isoform Comparison

Biological Activity

Protocol

References

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Precautionary Statements-General

Prevention

Response

Storage

Disposal

Physical hazards

Health hazards

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Nude mice	786.0 renal cell carcinoma xenograft model	Oral	10 mg/kg	Once daily for 7 days	To evaluate the antitumor activity of MSC in the 786.0 renal cell carcinoma xenograft model, results showed that MSC selectively stabilized tumor vasculature and enhanced the efficacy of subsequent treatments	Int J Mol Sci. 2018 Oct 29;19(11):3378
Caenorhabditis elegans (C. elegans)	Wildtype and txnrd-1 deletion mutants	Hatch incubation	100 μM	Single dose, 18 hours	To evaluate the protective effects of Se-Methylselenocysteine against oxidative stress and its modulation of the antioxidant defense system. Results showed that Se-Methylselenocysteine protected wildtype C. elegans from chemically-induced reactive oxygen and nitrogen species (RONS) formation, but no protective effect was observed in txnrd-1 deletion mutants.	Mol Nutr Food Res. 2019 May;63(9):e1801304
C57BL/6J mice	High-fat diet and streptozotocin-induced type 2 diabetes model	Oral	6.5 or 13 µg/kg MSC	Once daily for four weeks	Evaluate the effect of TAC/MSC on blood glucose and lipid metabolism in type 2 diabetic mice, results showed TAC/MSC significantly improved hyperglycemia and lipid metabolism disorder	Molecules. 2023 Jul 19;28(14):5499
Sprague-Dawley rats	DEN-induced hepatocellular carcinoma rat model	Oral	0.3 mg/kg, 1 mg/kg, 3 mg/kg	5 times per week for 6 consecutive weeks	MSC treatment significantly alleviated liver injury and nuclear lesions, improved liver function, decreased CD34 expression and NO/NOS levels, and suppressed VEGF expression.	Med Sci Monit. 2021 Aug 4;27:e929255

Bio Calculators
Preparing Stock Solutions		1mg	5mg	10mg
Preparing Stock Solutions	1 mM 5 mM 10 mM	5.49mL 1.10mL 0.55mL	27.46mL 5.49mL 2.75mL	54.92mL 10.98mL 5.49mL
Dissolving Methods	Animal experiment The prepared working fluid is recommended to be prepared now and used up as soon as possible in a short period of time. The percentage shown in front of the following solvent refers to the volume ratio of the solvent in the final solution; If precipitation or precipitation occurs in the preparation process, it can be assisted by heating and/or ultrasound. Protocol 1

Precautionary Statements-General
Code	Phrase
P101	If medical advice is needed,have product container or label at hand.
P102	Keep out of reach of children.
P103	Read label before use
Prevention
Code	Phrase
P201	Obtain special instructions before use.
P202	Do not handle until all safety precautions have been read and understood.
P210	Keep away from heat/sparks/open flames/hot surfaces. - No smoking.
P211	Do not spray on an open flame or other ignition source.
P220	Keep/Store away from clothing/combustible materials.
P221	Take any precaution to avoid mixing with combustibles
P222	Do not allow contact with air.
P223	Keep away from any possible contact with water, because of violent reaction and possible flash fire.
P230	Keep wetted
P231	Handle under inert gas.
P232	Protect from moisture.
P233	Keep container tightly closed.
P234	Keep only in original container.
P235	Keep cool
P240	Ground/bond container and receiving equipment.
P241	Use explosion-proof electrical/ventilating/lighting/equipment.
P242	Use only non-sparking tools.
P243	Take precautionary measures against static discharge.
P244	Keep reduction valves free from grease and oil.
P250	Do not subject to grinding/shock/friction.
P251	Pressurized container: Do not pierce or burn, even after use.
P260	Do not breathe dust/fume/gas/mist/vapours/spray.
P261	Avoid breathing dust/fume/gas/mist/vapours/spray.
P262	Do not get in eyes, on skin, or on clothing.
P263	Avoid contact during pregnancy/while nursing.
P264	Wash hands thoroughly after handling.
P265	Wash skin thouroughly after handling.
P270	Do not eat, drink or smoke when using this product.
P271	Use only outdoors or in a well-ventilated area.
P272	Contaminated work clothing should not be allowed out of the workplace.
P273	Avoid release to the environment.
P280	Wear protective gloves/protective clothing/eye protection/face protection.
P281	Use personal protective equipment as required.
P282	Wear cold insulating gloves/face shield/eye protection.
P283	Wear fire/flame resistant/retardant clothing.
P284	Wear respiratory protection.
P285	In case of inadequate ventilation wear respiratory protection.
P231 + P232	Handle under inert gas. Protect from moisture.
P235 + P410	Keep cool. Protect from sunlight.
Response
Code	Phrase
P301	IF SWALLOWED:
P304	IF INHALED:
P305	IF IN EYES:
P306	IF ON CLOTHING:
P307	IF exposed:
P308	IF exposed or concerned:
P309	IF exposed or if you feel unwell:
P310	Immediately call a POISON CENTER or doctor/physician.
P311	Call a POISON CENTER or doctor/physician.
P312	Call a POISON CENTER or doctor/physician if you feel unwell.
P313	Get medical advice/attention.
P314	Get medical advice/attention if you feel unwell.
P315	Get immediate medical advice/attention.
P320
P302 + P352	IF ON SKIN: wash with plenty of soap and water.
P321
P322
P330	Rinse mouth.
P331	Do NOT induce vomiting.
P332	IF SKIN irritation occurs:
P333	If skin irritation or rash occurs:
P334	Immerse in cool water/wrap n wet bandages.
P335	Brush off loose particles from skin.
P336	Thaw frosted parts with lukewarm water. Do not rub affected area.
P337	If eye irritation persists:
P338	Remove contact lenses, if present and easy to do. Continue rinsing.
P340	Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P341	If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.
P342	If experiencing respiratory symptoms:
P350	Gently wash with plenty of soap and water.
P351	Rinse cautiously with water for several minutes.
P352	Wash with plenty of soap and water.
P353	Rinse skin with water/shower.
P360	Rinse immediately contaminated clothing and skin with plenty of water before removing clothes.
P361	Remove/Take off immediately all contaminated clothing.
P362	Take off contaminated clothing and wash before reuse.
P363	Wash contaminated clothing before reuse.
P370	In case of fire:
P371	In case of major fire and large quantities:
P372	Explosion risk in case of fire.
P373	DO NOT fight fire when fire reaches explosives.
P374	Fight fire with normal precautions from a reasonable distance.
P376	Stop leak if safe to do so. Oxidising gases (section 2.4) 1
P377	Leaking gas fire: Do not extinguish, unless leak can be stopped safely.
P378
P380	Evacuate area.
P381	Eliminate all ignition sources if safe to do so.
P390	Absorb spillage to prevent material damage.
P391	Collect spillage. Hazardous to the aquatic environment
P301 + P310	IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P301 + P312	IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P301 + P330 + P331	IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P302 + P334	IF ON SKIN: Immerse in cool water/wrap in wet bandages.
P302 + P350	IF ON SKIN: Gently wash with plenty of soap and water.
P303 + P361 + P353	IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P304 + P312	IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell.
P304 + P340	IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P304 + P341	IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.
P305 + P351 + P338	IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P306 + P360	IF ON CLOTHING: Rinse Immediately contaminated CLOTHING and SKIN with plenty of water before removing clothes.
P307 + P311	IF exposed: call a POISON CENTER or doctor/physician.
P308 + P313	IF exposed or concerned: Get medical advice/attention.
P309 + P311	IF exposed or if you feel unwell: call a POISON CENTER or doctor/physician.
P332 + P313	IF SKIN irritation occurs: Get medical advice/attention.
P333 + P313	IF SKIN irritation or rash occurs: Get medical advice/attention.
P335 + P334	Brush off loose particles from skin. Immerse in cool water/wrap in wet bandages.
P337 + P313	IF eye irritation persists: Get medical advice/attention.
P342 + P311	IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician.
P370 + P376	In case of fire: Stop leak if safe to Do so.
P370 + P378	In case of fire:
P370 + P380	In case of fire: Evacuate area.
P370 + P380 + P375	In case of fire: Evacuate area. Fight fire remotely due to the risk of explosion.
P371 + P380 + P375	In case of major fire and large quantities: Evacuate area. Fight fire remotely due to the risk of explosion.
Storage
Code	Phrase
P401
P402	Store in a dry place.
P403	Store in a well-ventilated place.
P404	Store in a closed container.
P405	Store locked up.
P406	Store in corrosive resistant/ container with a resistant inner liner.
P407	Maintain air gap between stacks/pallets.
P410	Protect from sunlight.
P411
P412	Do not expose to temperatures exceeding 50 oC/ 122 oF.
P413
P420	Store away from other materials.
P422
P402 + P404	Store in a dry place. Store in a closed container.
P403 + P233	Store in a well-ventilated place. Keep container tightly closed.
P403 + P235	Store in a well-ventilated place. Keep cool.
P410 + P403	Protect from sunlight. Store in a well-ventilated place.
P410 + P412	Protect from sunlight. Do not expose to temperatures exceeding 50 oC/122oF.
P411 + P235	Keep cool.
Disposal
Code	Phrase
P501	Dispose of contents/container to ...
P502	Refer to manufacturer/supplier for information on recovery/recycling

Physical hazards
Code	Phrase
H200	Unstable explosive
H201	Explosive; mass explosion hazard
H202	Explosive; severe projection hazard
H203	Explosive; fire, blast or projection hazard
H204	Fire or projection hazard
H205	May mass explode in fire
H220	Extremely flammable gas
H221	Flammable gas
H222	Extremely flammable aerosol
H223	Flammable aerosol
H224	Extremely flammable liquid and vapour
H225	Highly flammable liquid and vapour
H226	Flammable liquid and vapour
H227	Combustible liquid
H228	Flammable solid
H229	Pressurized container: may burst if heated
H230	May react explosively even in the absence of air
H231	May react explosively even in the absence of air at elevated pressure and/or temperature
H240	Heating may cause an explosion
H241	Heating may cause a fire or explosion
H242	Heating may cause a fire
H250	Catches fire spontaneously if exposed to air
H251	Self-heating; may catch fire
H252	Self-heating in large quantities; may catch fire
H260	In contact with water releases flammable gases which may ignite spontaneously
H261	In contact with water releases flammable gas
H270	May cause or intensify fire; oxidizer
H271	May cause fire or explosion; strong oxidizer
H272	May intensify fire; oxidizer
H280	Contains gas under pressure; may explode if heated
H281	Contains refrigerated gas; may cause cryogenic burns or injury
H290	May be corrosive to metals
Health hazards
Code	Phrase
H300	Fatal if swallowed
H301	Toxic if swallowed
H302	Harmful if swallowed
H303	May be harmful if swallowed