Home Supplier Discovery Chemicals Sulfate

Lye Ash Manufacturers & Suppliers

Lye Ash Total 51 manufacturers & suppliers found with 153 products

Xinjiang Zhongtai Import And Export Co., Ltd.

China Supplier - Diamond MemberSince 2022

Suppliers with verified business licenses

5.0
Plant Area1004
Plant Area
Number of Employees35
Number of Employees
Trading Company
PVC Resin; Caustic Soda; PVC Paste Resin; CPVC; Pet
OEM, ODM, Own Brand
IATF16949
  • Good Price Zhongtai Chemical Naoh Lye Ash in Pearl Flakes Caustic Soda
    US$ 455 / Ton
    17 Tons (MOQ)
  • Customized Zhongtai Chemical Industrial Alkali Lye Ash in Pearl Flakes Price Caustic Soda
    US$ 455 / Ton
    17 Tons (MOQ)
  • Zhongtai Chemical Lye Ash Caustic Soda Pearls Price Naoh Flake New /
    US$ 455 / Ton
    17 Tons (MOQ)

WEIFANG TAINUO CHEMICAL CO., LTD.

China Supplier - Gold MemberSince 2018

Suppliers with verified business licenses

4.0
Plant Area66
Plant Area
Number of Employees10
Number of Employees
Trading Company
Melamine , Urea , Sodium Nitrite , Sodium Bicarbonate , Potassium Formate
OEM
ISO 9001, ISO 14001
  • Soda Ash Lignt for Additive
    US$ 280 / Ton
    44 Tons (MOQ)
  • Soda Ash Light 99.2% for Washing Soda
    US$ 280 / Ton
    44 Tons (MOQ)
  • Soda Ash Lignt for Laundering
    US$ 280 / Ton
    44 Tons (MOQ)

Guangxi Kunya Biological Technology Co., Ltd.

China Supplier - Gold MemberSince 2022

Suppliers with verified business licenses

4.0
Plant Area500
Plant Area
Manufacturer/Factory
Fertilizer; Urea; Ammonium Sulfate; DAP; Map , Chemicals; Daily Chemical; Medicine Chemical , Animal Feeds Medicine; Amino Acid; Lysine , Plant Growth Regulator; Oxytetracycline , Phosphoric Acid; Food Additives
OEM, ODM, Own Brand
ISO 9001, GMP
  • Best Price KOH CAS 1310-58-3 Potassium Hydroxide
    US$ 600 / Ton
    25 Tons (MOQ)
  • White Flake KOH CAS 1310-58-3 Potassium Hydroxide
    US$ 600 / Ton
    25 Tons (MOQ)
  • Sodium Hydroxide Naoh CAS 1310-73-2 Caustic Soda
    US$ 350 / Ton
    25 Tons (MOQ)

Henan Yeedok Industry Co., Ltd

China Supplier - Diamond MemberSince 2023

Suppliers with verified business licenses

5.0
Plant Area2000
Plant Area
Manufacturer/Factory
Sodium Lauryl Ether Sulphate/SLES /AES , Linear Alklybenzene Sulphonic Acid/LABSA , Trichloroisocyanuric Acid (TCCA) , Polyvinyl Chloride Resin(PVC Resin) , Dioctyl Phthalate DOP
OEM, ODM, Own Brand
ISO 9001, OHSAS/ OHSMS 18001, IATF16949, HSE, QC 080000...
  • 99% Flakes Caustic Soda /Pearls Caustic Soda for Soap Industry
    US$ 450 / Ton
    1 Ton (MOQ)
  • Factory Industrial Grade 99.5% Caustic Soda Pearls/Caustic Soda Flakes Sodium Hydroxide CAS: 1310-73-2 with Good Price
    US$ 450 / Ton
    1 Ton (MOQ)
  • Custom Hot Selling Good Quality Industrial Grade Naoh 99% Caustic Soda
    US$ 450 / Ton
    1 Ton (MOQ)

Shandong Near Chemical Co., Ltd.

China Supplier - Diamond MemberSince 2021

Suppliers with verified business licenses

5.0
Trading Company
Maleic Anhydride , Tetrachloroethene , Tdi , Tetrachloroethylene , Phthalic Anhydride
Own Brand
ISO 9001, ISO 29001
  • KOH 90%Min Industrial Grade 1310-58-3
    US$ 730 / Ton
    25 Tons (MOQ)
  • China 90%Min KOH White Flakes/Potassium Hydroxide/Caustic Potash
    US$ 730 / Ton
    25 Tons (MOQ)
  • High Quality Potassium Hydroxide/KOH/Caustic Potash1310-58-3
    US$ 730 / Ton
    25 Tons (MOQ)

Qingdao Hisea Chem Co., Ltd.

China Supplier - Gold MemberSince 2007

Suppliers with verified business licenses

4.0
Plant Area2000+
Plant Area
Manufacturer/Factory
Glacial Acetic Acid , Formic Acid , Soda Ash Light/Dense , Oxalic Acid , Tdi 80/20
OEM, ODM, Own Brand
ISO 9001
  • Factory Price of Sodium Hydroxide/Caustic Soda Flakes (NaOH) 99%
    US$ 470 / Ton
    21 Tons (MOQ)
  • Good Price of Caustic Soda Prills Flakes (NaOH) 99%
    US$ 470 / Ton
    21 Tons (MOQ)
  • 32%/48%/50%Liquid Sodium Hydroxide/Caustic Soda-Qingdao Hiseachem
    Negotiable
    25 Tons (MOQ)

FONDLAND CHEMICALS CO., LTD.

China Supplier - Diamond MemberSince 2021

Suppliers with verified business licenses

5.0
Plant Area500
Plant Area
Manufacturer/Factory , Trading Company
Soda Ash , Sodium Bicarbonate , Calcium Chloride , Ammonium Bicarbonate , Sodium Metabisulfite
OEM, ODM, Own Brand
ISO 14064
  • Chemical Industrial Grade 99% pH Dissolving Flakes Naoh Caustic Soda
    US$ 470 / Ton
    25 Tons (MOQ)
  • 99% Min Caustic Soda Used for Soap Making
    US$ 475 / Ton
    26 Tons (MOQ)
  • 25kg Bag Caustic Soda Flake Caustic Soda Pearls 99% Industry Grade
    US$ 470 / Ton
    22 Tons (MOQ)

Shandong Desenlai Chemical Co., Ltd

China Supplier - Gold MemberSince 2023

Suppliers with verified business licenses

4.0
Plant Area160
Plant Area
Number of Employees8
Number of Employees
Trading Company
N-Methyl Pyrrolidone , 1 4-Butanediol , Aniline , Adipic Acid , 2-Mercaptobenzothiazole
ODM, OEM
within 15 workdays
  • Sodium Hydroxide Caustic Soda Main Supplier 99% Caustic Soda Flakes CAS 1310-73-2
    US$ 450 / Ton
    1 Ton (MOQ)
  • Sodium Hydroxide Naoh Caustic Soda Flakes for Industrial Applications CAS 1310-73-2
    US$ 450 / Ton
    1 Ton (MOQ)
  • Caustic Soda Flakes / Pearl Sodium Hydroxide Naoh High Purity 99% CAS 1310-73-2
    US$ 450 / Ton
    1 Ton (MOQ)

THE TNN DEVELOPMENT LIMITED

China Supplier - Diamond MemberSince 2022

Suppliers with verified business licenses

5.0
Plant Area100
Plant Area
Manufacturer/Factory , Trading Company
Citric Acid , Xanthan Gum , Vitamin C Ascorbic Acid , Aspartame , Phosphoric Acid
OEM, ODM
Response Time≤3h
  • Caustic Soda Pearls 25 Kg Bags Caustic Soda Flakes 99%
    US$ 670 / Ton
    25 Tons (MOQ)
  • CAS No 1310-73-2 99% White Flake, Pearl Caustic Soda
    US$ 670 / Ton
    25 Tons (MOQ)
  • Drain Cleaner Caustic Soda 99% Flake Pearl Bead Soda Ash
    US$ 670 / Ton
    25 Tons (MOQ)

Hebei Jinhong Weibang Chemical Co., Ltd.

China Supplier - Diamond MemberSince 2011

Suppliers with verified business licenses

5.0
Manufacturer/Factory , Trading Company
Caustic Soda , Potassium Hydroxide , Calcium Carbide , Trichloroisocyanuric Acid , B00(1 4-Butanediol)
OEM, ODM
within 15 workdays
  • Caustic Soda 99% Chemicals Casno. 1310-73-2 Food Grade Lye Solution Liquid Pellet Pearl/ Flakes Sodium Hydroxide Naoh Caustic Soda for Soap
    US$ 420 / Ton
    28 Tons (MOQ)

Qingdao Twell Sansino Import & Export Co., Ltd.

China Supplier - Diamond MemberSince 2014

Suppliers with verified business licenses

5.0
Plant Area120
Plant Area
Number of Employees9
Number of Employees
Trading Company
Food Additive , Citric Acid , Sodium Alginate , Malic Acid , Tartaric Acid
OEM, ODM, Own Brand
ISO 9000
  • Sodium Hydroxide 99% (Caustic Soda, Lye) Tech Grade Naoh 99%
    US$ 350 / Ton
    1 Ton (MOQ)

Dadao Chemicals Co., Ltd.

China Supplier - Gold MemberSince 2021

Suppliers with verified business licenses

4.0
Plant Area2000
Plant Area
Manufacturer/Factory
PVC Resin , Paraffin Wax , Calcium Carbide , Urea , SLES
OEM, ODM
ISO 9001
  • Free Sample Potassium Hydroxide Flake Granule Pearl 90% 95% KOH 1310-58-3
    US$ 900 / Ton
    5 Tons (MOQ)

SHANDONG YUYUAN GROUP CO., LTD.

China Supplier - Diamond MemberSince 2020

Suppliers with verified business licenses

5.0
Plant Area2000+
Plant Area
Manufacturer/Factory , Trading Company
Urea , Sodium Metabisulphite , SCR Urea , Magnesium Chloride , Calcium Chloride
ISO 9001
Weifang, Shandong
  • Tta Tolyltriazole Used on Water Treatment
    US$ 1000 / Ton
    20 Tons (MOQ)
  • Tolyltriazole or Tta of Granular
    US$ 1000 / Ton
    20 Tons (MOQ)
  • Tolyltriazole for Corrosion Inhibitor of Copper
    US$ 1000 / Ton
    20 Tons (MOQ)

LK (NANJING) CO., LTD.

China Supplier - Diamond MemberSince 2009

Suppliers with verified business licenses

5.0
Manufacturer/Factory , Trading Company
Sodium Lauryl Ether Sulfate (SLES) , Linear Alkyl Benzene Sulphonic Acid (LABSA) , Sodium Polyacrylate , Ethylene Diamine Tetraacetic Acid (EDTA) , Modified Sodium Disilicate (Msd)
OEM, ODM, Own Brand
within 15 workdays
  • Food Grade Potassium Hydroxide Ethanolic KOH 95%
    US$ 699 / Ton
    20 Tons (MOQ)
  • Food Grade KOH Potassium Hydroxide 95%
    US$ 699 / Ton
    20 Tons (MOQ)
  • KOH 95% Potassium Hydroxide Powder
    US$ 699 / Ton
    20 Tons (MOQ)

Hebei Hangao Chemical Co., Ltd.

China Supplier - Diamond MemberSince 2023

Suppliers with verified business licenses

5.0
Plant Area1000
Plant Area
Trading Company
Paraffin Wax , EDTA , Copper Sulfate , HDPE , LDPE
OEM, ODM
Response Time≤3h
  • 99.2% Na2co3 Sodium Carbonate Soda Ash Light and Dense Powder Industrial Grade
    US$ 200 / Ton
    1 Ton (MOQ)
  • 99.2% Na2co3 Industrial Grade Dense/Light Soda Ash Sodium Carbonate
    US$ 200 / Ton
    1 Ton (MOQ)
  • Bulk 99.2% Sodium Carbonate Industry Grade Soda Ash Light/Dense for Glass Making
    US$ 200 / Ton
    1 Ton (MOQ)

Qingdao New Sanda Industry Co., Ltd.

China Supplier - Diamond MemberSince 2022

Suppliers with verified business licenses

5.0
Plant Area2000
Plant Area
Manufacturer/Factory , Trading Company
Titanium Dioxide , HPMC , Rdp , Vae , Citric Acid
OEM, ODM, Own Brand
ISO 9001, ISO 9000, ISO 14001, ISO 14000, ISO 20000...
  • Chemical Foaming Blowing Agent AC 7000 for PVC Shoes
    US$ 2.3 / kg
    25 kg (MOQ)
  • Chemical Foam Raw Material AC7000 Blowing Agent for Rubber Industry
    US$ 2.3 / kg
    25 kg (MOQ)
  • Factory Supply Foaming Blowing Agent AC for WPC Foaming Panel
    US$ 2.1 / kg
    25 kg (MOQ)

Jiangsu Wisdom Source Import and Export Trading Co., Ltd.

China Supplier - Diamond MemberSince 2023

Suppliers with verified business licenses

5.0
Plant Area180
Plant Area
Number of Employees4
Number of Employees
Trading Company
Sodium Carbonate , Sulfur Powder/Saltpeter , Antifreeze , Printing and Dyeing Auxiliaries , Livestock Feed Additives
ODM, OEM
within 15 workdays
  • Food Additive Sodium Hydroxide, Naoh≥ 98 GB 1886.20-2016
    US$ 300 / Ton
    20 Tons (MOQ)
  • Zhongyan Industrial-Grade Flake Sodium Hydroxide ≥ 98.5
    US$ 300 / Ton
    20 Tons (MOQ)
  • Junzheng Naoh≥ 98.5 Flake Sodium Hydroxide. Q/Nmjz Q 1102-2020
    US$ 300 / Ton
    20 Tons (MOQ)

Liaoning Jiahe Shengshi Pharmaceutical Technology Co., Ltd

China Supplier - Gold MemberSince 2023

Suppliers with verified business licenses

4.0
Plant Area2000
Plant Area
Number of Employees90
Number of Employees
Manufacturer/Factory , Trading Company
Chlorhexidine Base , Chlorhexidine Gluconate , Chlorhexidine Acetate , Chlorhexidine Hydrochloride , Benzethonium Chloride
ODM, Own Brand
ISO 9001, ISO 9000, ISO 14001, ISO 14000, ISO 20000...
  • China Products/Suppliers Producer Guanidine Carbonate 99.0% for Cosmetic Industry CAS No 593-85-1
    US$ 3982.6 / kg
    1000 kg (MOQ)
  • Organic Intermediate Guanidine Carbonate CAS 593-85-1 with High Quality
    US$ 3982.6 / kg
    1000 kg (MOQ)
  • Guanidine Carbonate CAS 593-85-1
    US$ 3982.6 / kg
    1000 kg (MOQ)

Shandong Hengyuan Overseas Industry Co., Ltd

China Supplier - Diamond MemberSince 2023

Suppliers with verified business licenses

5.0
Plant Area200
Plant Area
Number of Employees9
Number of Employees
Trading Company
Semi Trailer , Truck and Parts
Own Brand
ISO 9001, ISO 9000
  • 30cbm V Type Fly Ash Dry Powder Silo Tanker Bulk Cement Lime Tank Truck Trailer 60cbm Cement Bulker Carrier Bulk Trailer Cement
    US$ 5999 / Piece
    1 Piece (MOQ)
  • Fly Ash/Flour/Powder Material Tank Truck Semi Trailer V Shape Cement Tanker Dry Bulk Cement Semi Trailer
    US$ 5999 / Piece
    1 Piece (MOQ)
  • China Good Quality 3 Axle Fly Ash Bulk Cement Silo Tanker Truck Trailer with Engine for Sale
    US$ 5999 / Piece
    1 Piece (MOQ)

Shandong Dawnchem Company Limited

China Supplier - Gold MemberSince 2024

Suppliers with verified business licenses

4.0
Plant Area100
Plant Area
Manufacturer/Factory
Sodium Butyrate , Vitamin , Colorant , Amino Acid , Plant Extract
OEM
ISO 9001, ISO 20000, GMP, ISO 22000
  • Food Grade/ Feed Grade/Pharma Grade Vitamin B6 Pyridoxine Hydrochloride HCl Powder
    US$ 20 / kg
    100 kg (MOQ)
  • High Quality Hot Selling Food Grade 99% Vitamin B6 Powder
    US$ 20 / kg
    100 kg (MOQ)
  • Factory Directly Supply Stable Quality Pyridoxine HCl Powder Vitamin B6
    US$ 20 / kg
    100 kg (MOQ)

Yixing Huarui Incinerator Technology Development Co., Ltd.

China Supplier - Gold MemberSince 2021

Suppliers with verified business licenses

4.0
Plant Area2000+
Plant Area
Manufacturer/Factory
Rotary Kiln Incinerator , Solid Waste Incinerator , Medical Waste Incinerator , Waste Gas Rto Incinerator , Industrial Waste Incinerator
Own Brand
ISO 9001
  • High Tech Total Waste Disposal Solid Waste Incinerator Medical Waste Burner
    US$ 30000 / Set
    1 Set (MOQ)
  • High Efficiency and Fully Burning Solid Waste Incinerator Garbage Burning Treatment
    US$ 30000 / Set
    1 Set (MOQ)
  • High Standard Domestic Life Waste Without Any Smoke Smell Second Public Pollution Small Waste Incinerator
    US$ 6000 / Set
    1 Set (MOQ)

Shaanxi Haibo Biological Technology Co., Ltd

China Supplier - Diamond MemberSince 2024

Suppliers with verified business licenses

5.0
Plant Area200
Plant Area
Number of Employees28
Number of Employees
Trading Company
Plant Extract , Food Additives , Cosmetic Raw Materials , Pharmaceutical Raw Materials , Daily Chemicals
within 15 workdays
Xi'an, Shaanxi
  • Food Grade Nutrient Supplement 99% L-Methionine
    US$ 6.4 / kg
    1 kg (MOQ)
  • Supply Food Preservatives Powder CAS 7681-93-8 Natamycin
    US$ 69 / kg
    1 kg (MOQ)
  • Spot Feed Additives 60% Choline Chloride
    US$ 1.28 / kg
    1 kg (MOQ)

Qingdao YLSCH Industry & Trade Co., Ltd.

China Supplier - Gold MemberSince 2019

Suppliers with verified business licenses

4.0
Plant Area500
Plant Area
Manufacturer/Factory , Trading Company
Rre-Dispersed Rubber Chemicals , Azodicarbonamide , AC Blowing Agent , Rubber Vulcanization Agent , Rubber Chemicals/Additives
OEM, ODM, Own Brand
Response Time≤3h
  • Rubber Accelerator Mbts CAS No. 120-78-5
    US$ 3 / kg
    500 kg (MOQ)
  • Rubebr Chemicals Rubber Accelerator Mbts CAS No. 120-78-5 Gray-White Color for Sales
    US$ 3 / kg
    500 kg (MOQ)
  • Rubebr Chemicals Rubber Accelerator Mbts CAS No. 120-78-5 Gray-White Color
    US$ 3 / kg
    500 kg (MOQ)

Weifang Hairui Xinsheng Environmental Protection Equipment Manufacturing Co., Ltd.

China Supplier - Diamond MemberSince 2024

Suppliers with verified business licenses

5.0
Plant Area500
Plant Area
Number of Employees8
Number of Employees
Manufacturer/Factory
Environmental Equipment , Medical Waste Treatment Equipment , Domestic Waste Disposal Equipment , Kitchen Waste Treatment Equipment , Cutter Suction Dredger
ODM, OEM
ISO 9001, ISO 14000, ISO 14064
  • Rubber Plastic Waste Incinerator Municipal Waste Incinerator
    US$ 2900 / Set
    1 Set (MOQ)
  • Medical Waste Incinerator for Dead Animal Carcass
    US$ 2900 / Set
    1 Set (MOQ)
  • Horizontal Hospital Waste Medical Waste Incinerator
    US$ 2900 / Set
    1 Set (MOQ)

Briture Co., Ltd.

China Supplier - Diamond MemberSince 2011

Suppliers with verified business licenses

5.0
Plant Area500
Plant Area
Manufacturer/Factory , Trading Company
Concrete PP Fiber , Acrylic Resin , Chlorinated Polypropylene , Peek , PP Twist Fiber
OEM, ODM
ISO 9001, GMP
  • Tolyltriazole for Corrosion Inhibitor of Copper
    US$ 3.9 / kg
    1000 kg (MOQ)
  • Tolyltriazole for Cycle Water Treatment
    US$ 3.9 / kg
    1000 kg (MOQ)
  • Tolyltriazole for Corrosion Inhibitor for Metals
    US$ 3.9 / kg
    1000 kg (MOQ)

Hebei Jinchangsheng Chemical Technology Co., Ltd.

China Supplier - Diamond MemberSince 2014

Suppliers with verified business licenses

5.0
Plant Area2000+
Plant Area
Manufacturer/Factory , Trading Company
Copper Sulfate , Acetic Acid , Formic Acid , Ethanol , Isopropyl Alcohol
OEM, ODM
ISO 9001, ISO 9000, HSE, GMP
  • Soda Ash Manufacturer Sodium Carbonate Wholesale Price
    US$ 380 / Ton
    1 Ton (MOQ)
  • Soda Ash 99.2% for Sale China Manufacturer Chemical Factory Supply
    US$ 380 / Ton
    1 Ton (MOQ)
  • Manufacturer Sale Soda Ash Good Price CAS 497-19-8
    US$ 380 / Ton
    1 Ton (MOQ)

Shenzhen Guangyang Zhongkang Technology Co., Ltd.

China Supplier - Diamond MemberSince 2020

Suppliers with verified business licenses

5.0
Plant Area1150
Plant Area
Number of Employees15
Number of Employees
Trading Company
Brain Photobiomodulation Helmet , Laser Therapy Watch , Rhinitis Laser Therapy Device , Ultrasound Therapy Machine
OEM, ODM
ISO9001:2015
  • Suyzeko Hydrogen Generation Breathing Device 600ml Hydrogen Naturopathy Equipment
    US$ 660 / unit
    1 unit (MOQ)
  • Hh2 Hydrogen Oxygen Breathing Machine Spe 99.996% Pure Hydrogen Inhalator
    US$ 1980 / unit
    1 unit (MOQ)
  • Spe Hydrogen Generation Machine 3000ml Oxy-Hydrogen Brown Gas Inhalation Equipment
    US$ 1980 / unit
    1 unit (MOQ)

Henan Hongke Heavy Machinery Co., Ltd.

China Supplier - Diamond MemberSince 2014

Suppliers with verified business licenses

5.0
Plant Area2000+
Plant Area
Number of Employees110
Number of Employees
Manufacturer/Factory , Trading Company
Rotary Kiln , Raymond Mill , Ball Mill , Dryer , Crusher
Own Brand, ODM, OEM
within 15 workdays
  • 100-150tpd Zinc Oxide Rotary Kiln Manufacturer Plant Eaf Rotary Kiln Pilot Plant
    US$ 340000 / Set
    1 Set (MOQ)
  • Factory Price Extraction Zinc Rotary Kiln Zinc Oxide Kiln Production Line
    US$ 340000 / Set
    1 Set (MOQ)
  • 2.5X45m Zinc Oxide Rotary Kiln Production Line Eaf Dust Rotary Kiln Price
    US$ 340000 / Set
    1 Set (MOQ)

Zhengzhou Hengxing Engineering Technology Co., Ltd.

China Supplier - Diamond MemberSince 2022

Suppliers with verified business licenses

5.0
Plant Area2000+
Plant Area
Manufacturer/Factory
Ball Mill , Stone Crusher , Cement Ball Mill , Rotary Dryer , Rotary Kiln
OEM
ISO 20000
  • High Efficiency Active Lime Processing Rotary Kiln Incinerator
    US$ 35000 / set
    1 set (MOQ)
  • High Efficiency Zinc Oxide Rotary Kiln Production Line
    US$ 35000 / set
    1 set (MOQ)
  • 100tpd Horizontal Rotary Kiln for Calcining Zinc Oxide
    US$ 35000 / set
    1 set (MOQ)

Sure Chemical Co., Ltd. Shijiazhuang

China Supplier - Gold MemberSince 2015

Suppliers with verified business licenses

4.0
Plant Area112
Plant Area
Number of Employees6
Number of Employees
Trading Company
Concrete Admixture; (PCE); SNF; SMF; SG; Food additives; Magnesium Sulphate; Sodium Bicarbonate; Sodium Metabisulphite; Fertilizer; Calcium Nitrate; MKP; MAP; Epsom Salts
OEM
ISO 9001, ISO 14001, ISO 22000
  • Corrosion Inhibitor 99.5% Tta Tolytriazole
    US$ 1 / kg
    1 kg (MOQ)
  • Hot Sale High Quality Tolyltriazole (CAS: 29385-43-1)
    US$ 3.1 / Ton
    1 Ton (MOQ)
Items per Page: 10 | 30 | 50